Cleaning up key pieces of the router/ tree

I'm talking about things like router/rc, router/httpd, router/cstats, etc... You know, the more "critical" pieces that make up the "core" of Tomato.

Most of these are built with -Wall, much to my chagrin. However, none of them are built with -Werror, much to my dismay.

Enabling -Werror on router/rc and router/httpd -- as far as I'm willing to go tonight -- unleashes a potpourri of assorted issues, such as:

1. Lots of unused variables (which are truly unused, vs. needing to be...

Cleaning up key pieces of the router/ tree