fixed dns_variomedia_rm for wildcard certs

fixed dns_variomedia_rm to respect the txtvalue supplied as function parameter

dnsapi/dns_variomedia.sh

@@ -77,7 +77,7 @@ dns_variomedia_rm() {
     return 1
   fi
 
-  _record_id="$(echo $response | cut -d '[' -f2 | cut -d']' -f1  | sed 's/},[ \t]*{/\},§\{/g' | tr § '\n' | grep $_sub_domain | sed 's/^{//;s/}[,]?$//' | tr , '\n' | tr -d '\"' | grep ^id | cut -d : -f2 | tr -d ' ')"
+  _record_id="$(echo $response | cut -d '[' -f2 | cut -d']' -f1  | sed 's/},[ \t]*{/\},§\{/g' | tr § '\n' | grep $_sub_domain | grep $txtvalue | sed 's/^{//;s/}[,]?$//' | tr , '\n' | tr -d '\"' | grep ^id | cut -d : -f2 | tr -d ' ')"
   _debug _record_id "$_record_id"
   if [ "$_record_id" ]; then
     _info "Successfully retrieved the record id for ACME challenge."