Fix issue #2833 with backslash in JSON

Backslash will be removed form JSON responses for each request
and for the initial configuration request

acme.sh

@@ -2086,7 +2086,7 @@ _send_signed_request() {
 
     _debug2 original "$response"
     if echo "$responseHeaders" | grep -i "Content-Type: *application/json" >/dev/null 2>&1; then
-      response="$(echo "$response" | _normalizeJson)"
+      response="$(echo "$response" | _normalizeJson | _json_decode)"
     fi
     _debug2 response "$response"
 
@@ -2503,6 +2503,7 @@ _initAPI() {
       _err "Can not init api."
       return 1
     fi
+    response=$(echo "$response" | _json_decode)
     _debug2 "response" "$response"
 
     ACME_KEY_CHANGE=$(echo "$response" | _egrep_o 'key-change" *: *"[^"]*"' | cut -d '"' -f 3)
@@ -6428,7 +6429,7 @@ Commands:
   --createCSR, -ccsr       Create CSR , professional use.
   --deactivate             Deactivate the domain authz, professional use.
   --set-notify             Set the cron notification hook, level or mode.
-  --set-default-ca         Used with '--server' , to set the default CA to use to use. 
+  --set-default-ca         Used with '--server' , to set the default CA to use to use.
 
 
 Parameters:
@@ -6470,8 +6471,8 @@ Parameters:
 
   --eab-kid EAB_KID                 Key Identifier for External Account Binding.
   --eab-hmac-key EAB_HMAC_KEY       HMAC key for External Account Binding.
-            
-            
+
+
   These parameters are to install the cert to nginx/apache or any other server after issue/renew a cert:
 
   --cert-file                       After issue/renew, the cert will be copied to this path.
@@ -6502,7 +6503,7 @@ Parameters:
   --ca-path                         Specifies directory containing CA certificates in PEM format, used by wget or curl.
   --nocron                          Only valid for '--install' command, which means: do not install the default cron job.
                                     In this case, the certs will not be renewed automatically.
-  
+
   --noprofile                       Only valid for '--install' command, which means: do not install aliases to user profile.
   --no-color                        Do not output color text.
   --force-color                     Force output of color text. Useful for non-interactive use with the aha tool for HTML E-Mails.