fix bug: multi webroots

acme.sh

@@ -1009,7 +1009,6 @@ issue() {
       _err "set up apache error. Report error to me."
       return 1
     fi
-    wellknown_path="$ACME_DIR"
   else
     usingApache=""
   fi
@@ -1242,11 +1241,10 @@ issue() {
         _debug serverproc $serverproc
 
       else
-        if [[ -z "$wellknown_path" ]] ; then
+        if [[ "$_currentRoot" == "apache" ]] ; then
+          wellknown_path="$ACME_DIR"
+        else
           wellknown_path="$_currentRoot/.well-known/acme-challenge"
-        fi
-        _debug wellknown_path "$wellknown_path"
-        
           if [[ ! -d "$_currentRoot/.well-known" ]] ; then 
             removelevel='1'
           elif [[ ! -d "$_currentRoot/.well-known/acme-challenge" ]] ; then 
@@ -1254,6 +1252,9 @@ issue() {
           else
             removelevel='3'
           fi
+        fi
+
+        _debug wellknown_path "$wellknown_path"
 
         token="$(echo -e -n "$keyauthorization" | cut -d '.' -f 1)"
         _debug "writing token:$token to $wellknown_path/$token"