Dont use $? directly anymore

dnsapi/dns_nm.sh

@@ -36,9 +36,10 @@ dns_nm_add() {
   get="https://namemaster.de/api/api.php?User=$NM_user&Password=$NM_md5&Antwort=csv&Int=0&Typ=ACME&Zone=$zone&hostname=$fulldomain&TXT=$txt_value&Action=Auto&Lifetime=3600"
   erg="$(_get "$get")"
 
-  if [ "$?" != "0" ]; then
+  exit_code="$?"
+  if [ "$exit_code" != 0 ]; then
     _err "error Ading $zone TXT: $txt_value"
-    _err "Error $?"
+    _err "Error $exit_code"
     return 1
   fi
 
@@ -70,9 +71,11 @@ dns_nm_rm() {
   zone="$(echo $fulldomain | _egrep_o "[^.]+.[^.]+$")"
   get="https://namemaster.de/api/api.php?User=$NM_user&Password=$NM_md5&Antwort=csv&Int=0&Typ=TXT&Zone=$zone&hostname=$fulldomain&TXT=$txt_value&Action=Delete_IN&TTL=0"
   erg="$(_get "$get")"
-  if [ "$?" != "0" ]; then
+
+  exit_code="$?"
+  if [ "$exit_code" != "0" ]; then
     _err "error Deleting $zone TXT: $txt_value"
-    _err "Error $?"
+    _err "Error $exit_code?"
     return 1
   fi