Rename 'mkuser' command to 'mkuserconfig'

Brings the name more in line with what it actually does.

Change-Id: I0adb14deb1a035abdbe51714356bd0c94ccf04c5
diff --git a/cmds/installd/commands.c b/cmds/installd/commands.c
index 8911570..4d57dea 100644
--- a/cmds/installd/commands.c
+++ b/cmds/installd/commands.c
@@ -265,7 +265,7 @@
     return 0;
 }
 
-int create_user(userid_t userid)
+int make_user_config(userid_t userid)
 {
     if (ensure_config_user_dirs(userid) == -1) {
         return -1;