diff --git a/.github/workflows/DNS.yml b/.github/workflows/DNS.yml
index 538a1cfc..ac1937af 100644
--- a/.github/workflows/DNS.yml
+++ b/.github/workflows/DNS.yml
@@ -53,7 +53,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
@@ -92,7 +92,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Install tools
@@ -130,7 +130,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - name: Set git to use LF
       run: |
@@ -183,7 +183,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
@@ -193,6 +193,7 @@ jobs:
         envs: 'TEST_DNS TestingDomain TEST_DNS_NO_WILDCARD TEST_DNS_NO_SUBDOMAIN TEST_DNS_SLEEP CASE TEST_LOCAL DEBUG ${{ secrets.TokenName1}} ${{ secrets.TokenName2}} ${{ secrets.TokenName3}} ${{ secrets.TokenName4}} ${{ secrets.TokenName5}}'
         prepare: pkg install -y socat curl
         usesh: true
+        copyback: false
         run: |
           if [ "${{ secrets.TokenName1}}" ] ; then
             export ${{ secrets.TokenName1}}=${{ secrets.TokenValue1}}
@@ -223,7 +224,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
@@ -231,6 +232,7 @@ jobs:
     - uses: vmactions/solaris-vm@v0
       with:
         envs: 'TEST_DNS TestingDomain TEST_DNS_NO_WILDCARD TEST_DNS_NO_SUBDOMAIN TEST_DNS_SLEEP CASE TEST_LOCAL DEBUG ${{ secrets.TokenName1}} ${{ secrets.TokenName2}} ${{ secrets.TokenName3}} ${{ secrets.TokenName4}} ${{ secrets.TokenName5}}'
+        copyback: false
         prepare: pkgutil -y -i socat
         run: |
           pkg set-mediator -v -I default@1.1 openssl
@@ -265,7 +267,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
@@ -275,6 +277,7 @@ jobs:
         envs: 'TEST_DNS TestingDomain TEST_DNS_NO_WILDCARD TEST_DNS_NO_SUBDOMAIN TEST_DNS_SLEEP CASE TEST_LOCAL DEBUG ${{ secrets.TokenName1}} ${{ secrets.TokenName2}} ${{ secrets.TokenName3}} ${{ secrets.TokenName4}} ${{ secrets.TokenName5}}'
         prepare: pkg_add socat curl
         usesh: true
+        copyback: false
         run: |
           if [ "${{ secrets.TokenName1}}" ] ; then
             export ${{ secrets.TokenName1}}=${{ secrets.TokenValue1}}
@@ -305,7 +308,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
@@ -314,9 +317,9 @@ jobs:
       with:
         envs: 'TEST_DNS TestingDomain TEST_DNS_NO_WILDCARD TEST_DNS_NO_SUBDOMAIN TEST_DNS_SLEEP CASE TEST_LOCAL DEBUG ${{ secrets.TokenName1}} ${{ secrets.TokenName2}} ${{ secrets.TokenName3}} ${{ secrets.TokenName4}} ${{ secrets.TokenName5}}'
         prepare: |
-          export PKG_PATH="http://cdn.NetBSD.org/pub/pkgsrc/packages/NetBSD/$(uname -p)/$(uname -r|cut -f '1 2' -d.)/All/"
           pkg_add curl socat
         usesh: true
+        copyback: false
         run: |
           if [ "${{ secrets.TokenName1}}" ] ; then
             export ${{ secrets.TokenName1}}=${{ secrets.TokenValue1}}
@@ -347,7 +350,7 @@ jobs:
       TEST_DNS_SLEEP: ${{ secrets.TEST_DNS_SLEEP }}
       CASE: le_test_dnsapi
       TEST_LOCAL: 1
-      DEBUG: 1
+      DEBUG: ${{ secrets.DEBUG }}
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
@@ -358,6 +361,7 @@ jobs:
         prepare: |
           pkg install -y curl socat
         usesh: true
+        copyback: false
         run: |
           if [ "${{ secrets.TokenName1}}" ] ; then
             export ${{ secrets.TokenName1}}=${{ secrets.TokenValue1}}
diff --git a/.github/workflows/FreeBSD.yml b/.github/workflows/FreeBSD.yml
index 676b67c7..74b69745 100644
--- a/.github/workflows/FreeBSD.yml
+++ b/.github/workflows/FreeBSD.yml
@@ -56,6 +56,7 @@ jobs:
           "8080": "80"
         prepare: pkg install -y socat curl
         usesh: true
+        copyback: false
         run: |
           cd ../acmetest \
           && ./letest.sh
diff --git a/.github/workflows/NetBSD.yml b/.github/workflows/NetBSD.yml
index 616dfc39..84bf96b8 100644
--- a/.github/workflows/NetBSD.yml
+++ b/.github/workflows/NetBSD.yml
@@ -58,6 +58,7 @@ jobs:
           export PKG_PATH="http://cdn.NetBSD.org/pub/pkgsrc/packages/NetBSD/$(uname -p)/$(uname -r|cut -f '1 2' -d.)/All/"
           pkg_add curl socat
         usesh: true
+        copyback: false
         run: |
           cd ../acmetest \
           && ./letest.sh
diff --git a/.github/workflows/OpenBSD.yml b/.github/workflows/OpenBSD.yml
index 4f17780f..6aba1b2a 100644
--- a/.github/workflows/OpenBSD.yml
+++ b/.github/workflows/OpenBSD.yml
@@ -56,6 +56,7 @@ jobs:
           "8080": "80"
         prepare: pkg_add socat curl
         usesh: true
+        copyback: false
         run: |
           cd ../acmetest \
           && ./letest.sh
diff --git a/README.md b/README.md
index 27e933ca..30e6e554 100644
--- a/README.md
+++ b/README.md
@@ -509,6 +509,12 @@ Support this project with your organization. Your logo will show up here with a
 <a href="https://opencollective.com/acmesh/organization/8/website"><img src="https://opencollective.com/acmesh/organization/8/avatar.svg"></a>
 <a href="https://opencollective.com/acmesh/organization/9/website"><img src="https://opencollective.com/acmesh/organization/9/avatar.svg"></a>
 
+
+#### Sponsors
+
+[![quantumca-acmesh-logo](https://user-images.githubusercontent.com/8305679/183255712-634ee1db-bb61-4c03-bca0-bacce99e078c.svg)](https://www.quantumca.com.cn/?__utm_source=acmesh-donation)
+
+
 # 19. License & Others
 
 License is GPLv3
diff --git a/acme.sh b/acme.sh
index ef37f163..9ac8caf9 100755
--- a/acme.sh
+++ b/acme.sh
@@ -436,24 +436,14 @@ _secure_debug3() {
   fi
 }
 
-__USE_TR_RAW="$([ "$(echo "abc" | tr a-z A-Z 2>/dev/null)" = "ABC" ] && echo 1 || echo 0)"
-
 _upper_case() {
-  if [ "$__USE_TR_RAW" = "0" ]; then
-    tr '[:lower:]' '[:upper:]'
-  else
-    # shellcheck disable=SC2018,SC2019
-    tr 'a-z' 'A-Z'
-  fi
+  # shellcheck disable=SC2018,SC2019
+  tr '[a-z]' '[A-Z]'
 }
 
 _lower_case() {
-  if [ "$__USE_TR_RAW" = "0" ]; then
-    tr '[:upper:]' '[:lower:]'
-  else
-    # shellcheck disable=SC2018,SC2019
-    tr 'A-Z' 'a-z'
-  fi
+  # shellcheck disable=SC2018,SC2019
+  tr '[A-Z]' '[a-z]'
 }
 
 _startswith() {
diff --git a/dnsapi/dns_miab.sh b/dnsapi/dns_miab.sh
index 7e697704..dad69bde 100644
--- a/dnsapi/dns_miab.sh
+++ b/dnsapi/dns_miab.sh
@@ -163,6 +163,7 @@ _retrieve_miab_env() {
   _saveaccountconf_mutable MIAB_Username "$MIAB_Username"
   _saveaccountconf_mutable MIAB_Password "$MIAB_Password"
   _saveaccountconf_mutable MIAB_Server "$MIAB_Server"
+  return 0
 }
 
 #Useage: _miab_rest  "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"  "custom/_acme-challenge.www.domain.com/txt  "POST"