create_vhost.sh: fix IPv6 Error in case of overwriting existing vhost entry.

create_vhost.sh

@@ -2111,10 +2111,10 @@ fi
 _default_ipv6=false
 
 
-if [[ -n "${IPv4_FIRST}" ]]; then
+if [[ -n "${IPv4_FIRST}" ]] || [[ -n "${_ipv4}" ]]; then
    _default_ipv4=true
 fi
-if [[ -n "${IPv6_FIRST}" ]]; then
+if [[ -n "${IPv6_FIRST}" ]] || [[ -n "${_ipv6}" ]]; then
    _default_ipv6=true
 fi