fix list returned by rc_service_extra_commands

This function was returning the setting of the variable $opts, which is
not correct. $opts was used in baselayout-1, but it is replaced by
$extra_commands and $extra_started_commands in openrc.

This does not appear to break backward compatibility since this function
does not appear to be used anywhere in the openrc code.

Thanks to James Le Cuirot for the original patch.

X-Gentoo-Bug: 360013
X-Gentoo-Bug-URL: http://bugs.gentoo.org/show_bug.cgi?id=360013

src/librc/librc.c

@@ -525,7 +525,7 @@ rc_service_exists(const char *service)
 }
 librc_hidden_def(rc_service_exists)
 
-#define OPTSTR ". '%s'; echo $opts"
+#define OPTSTR ". '%s'; echo $extra_commands $extra_started_commands"
 RC_STRINGLIST *
 rc_service_extra_commands(const char *service)
 {