Don't allow removal of reserved usernames

src/freedombone-rmuser

     exit 1
 fi
 
+if [[ $MY_USERNAME == 'git' || $MY_USERNAME == 'mirrors' ]]; then
+    echo $'Cannot remove reserved users'
+    exit 2
+fi
+
 if [ ! -d /home/$MY_USERNAME ]; then
     echo $"Home directory does not exist for $MY_USERNAME"
-    exit 2
+    exit 3
 fi
 
 if [ ! -f $COMPLETION_FILE ]; then
     echo $"$COMPLETION_FILE not found"
-    exit 3
+    exit 4
 fi
 
 if ! grep -q "Admin user" $COMPLETION_FILE; then
     echo $"No admin user specified in $COMPLETION_FILE"
-    exit 4
+    exit 5
 fi
 
 ADMIN_USERNAME=$(cat $COMPLETION_FILE | grep "Admin user" | awk -F ':' '{print $2}')
 if [ ! $ADMIN_USERNAME ]; then
     echo $"No admin username specified in $COMPLETION_FILE"
-    exit 5
+    exit 6
 fi
 
 if [[ $MY_USERNAME == $ADMIN_USERNAME ]]; then
     echo $"The administrator user cannot be removed"
-    exit 6
+    exit 7
 fi
 
 echo $'>>> REMOVE USER <<<'
 read -p $"Do you really wish to remove the user '$MY_USERNAME' (y/n) ?" yn
 if [[ $yn != 'y' && $yn != 'Y' && $yn != 'yes' && $yn != 'Yes' && $yn != 'YES' ]]; then
     echo $"User $MY_USERNAME was not removed"
-    exit 7
+    exit 8
 fi
 
 if grep -q "install_xmpp" $COMPLETION_FILE; then