Allow to use up to 229 characters for VM names on >=13.0

The limit was increased in this commit: https://svnweb.freebsd.org/base?view=revision&revision=349948

lib/vm-core

@@ -153,7 +153,7 @@ core::create(){
     [ -z "${_name}" ] && util::usage
 
     # check guest name
-    util::check_name "${_name}" 46 || util::err "invalid virtual machine name - '${_name}'"
+    util::check_name "${_name}" || util::err "invalid virtual machine name - '${_name}'"
     datastore::get_guest "${_name}" && util::err "virtual machine already exists in ${VM_DS_PATH}/${_name}"
     datastore::get "${_ds}" || util::err "unable to load datastore - '${_ds}'"
 

lib/vm-util

@@ -360,7 +360,12 @@ util::check_name(){
     local _name="$1"
     local _maxlen="$2"
 
-    : ${_maxlen:=30}
+    if [ ${VERSION_BSD} -ge 1300000 ]; then
+        : ${__maxlen:=229}
+    else
+        : ${_maxlen:=30}
+    fi
+
     echo "${_name}" | egrep -iqs "^[a-z0-9][.a-z0-9_-]{0,${_maxlen}}[a-z0-9]\$"
 }