Move git-upload-pack command to git plugin

Also use the same APP escaping as used for other git commands.

plugins/git/commands

@@ -34,6 +34,13 @@ case "$1" in
     done
     ;;
 
+  git-upload-pack)
+    APP="$(echo $2 | perl -pe 's/(?<!\\)'\''//g' | sed 's/\\'\''/'\''/g')"
+    pluginhook pre-pull $APP
+    cat | git-upload-pack "$DOKKU_ROOT/$APP"
+    pluginhook post-pull $APP
+    ;;
+
   git-*)
     APP="$(echo $2 | perl -pe 's/(?<!\\)'\''//g' | sed 's/\\'\''/'\''/g')"
     APP_PATH=$DOKKU_ROOT/$APP