Merge pull request #835 from expa/mh-fix-substring-match

[domains] make sure we match the specific string in VHOST

plugins/domains/commands

@@ -54,7 +54,7 @@ case "$1" in
       exit 1
     fi
 
-    if [[ $(grep $3 "$DOKKU_ROOT/$APP/VHOST" > /dev/null 2>&1; echo $?) -eq 0 ]]; then
+    if [[ $(egrep ^"$3"$ "$DOKKU_ROOT/$APP/VHOST" > /dev/null 2>&1; echo $?) -eq 0 ]]; then
       echo "$3 is already defined for $APP"
       exit 1
     fi