Kill /proc/sysvipc and friends. This is a pure case of interface duplication,
since we have the ipcs command and nice fine /proc/sys/kernel entries for the
relevant stuff... Fortunately apparently nothing is using it.

Fix improper extern inline usage in ipc/utils.h as well as add
some static attributes to local functions found there.

If some "embedded" system user starts to holler about
memory issues. Well:

[root@domek linux]# size /usr/bin/ipcs
    text    data     bss     dec     hex filename
   13433     324      32   13789    35dd /usr/bin/ipcs

And now count the pages used to implement /proc/sysvipc entires +
the few kilbytes of actual code removed from the kernel.

As an added bonus the functions implementing /proc/sysvipc
where accessible by everyone and getting the msg_ide.sem and similar
semaphores for quite a significant amount of time...

Perhaps it is time as well to look at the two different
IPC structures carried around there ("64 bit" and 32 bit)
and the double liked list usage there?