svc.sh: treat arguments as strings

svc.sh

@@ -33,11 +33,11 @@ NC='\033[0m' # No Color
 case $1 in
 
         link | --link-service )
-            ln -v -s /etc/sv/$2 /var/service/
+            ln -v -s /etc/sv/"${2}" /var/service/
           ;;
 
         unlink | --remove-service )
-            rm -v /var/service/$2
+            rm -v /var/service/"${2}"
           ;;
 
 				linked | --linked-services )