fix https://github.com/Neilpang/acme.sh/issues/491

dnsapi/dns_cx.sh

@@ -82,7 +82,7 @@ existing_records() {
     return 1
   fi
 
-  seg=$(printf "%s\n" "$response" | _egrep_o '{[^{]*host":"'"$_sub_domain"'"[^}]*\}')
+  seg=$(printf "%s\n" "$response" | _egrep_o '[^{]*host":"'"$_sub_domain"'"[^}]*\}')
   _debug seg "$seg"
   if [ -z "$seg" ]; then
     return 0
@@ -155,7 +155,7 @@ _get_root() {
     fi
 
     if _contains "$response" "$h."; then
-      seg=$(printf "%s\n" "$response" | _egrep_o '{[^{]*"'"$h"'."[^}]*}')
+      seg=$(printf "%s\n" "$response" | _egrep_o '[^{]*"'"$h"'."[^}]*}')
       _debug seg "$seg"
       _domain_id=$(printf "%s\n" "$seg" | _egrep_o "\"id\":\"[^\"]*\"" | cut -d : -f 2 | tr -d \")
       _debug _domain_id "$_domain_id"