fix content type

acme.sh

@@ -1626,15 +1626,20 @@ _post() {
     if [ "$HTTPS_INSECURE" ]; then
       _CURL="$_CURL --insecure  "
     fi
-    if [ "$_postContentType" ]; then
-      _CURL="$_CURL -H \"Content-Type: $_postContentType\" "
-    fi
     _debug "_CURL" "$_CURL"
     if [ "$needbase64" ]; then
+      if [ "$_postContentType" ]; then
+        response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url" | _base64)"
+      else
         response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url" | _base64)"
+      fi
+    else
+      if [ "$_postContentType" ]; then
+        response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url")"
       else
         response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url")"
       fi
+    fi
     _ret="$?"
     if [ "$_ret" != "0" ]; then
       _err "Please refer to https://curl.haxx.se/libcurl/c/libcurl-errors.html for error code: $_ret"