Added IRIX signal delivery
ansi knf
Implement AF_INET6 back-ends for inet_net_ntop() and inet_net_pton(), from
the BIND 8.3.0-T2A sources.  Thanks to Paul Vixie for the pointer to it.
Add the rest of the infrastructure needed to support the rest of the
ports.  This includes cleaning out DBG, cleaning up the `clean'
target, and tweaking the warnings flags (cesfic, amigappc, and the arm
ports are a little less warning resistant).

Oh, and let's `install' the kernel into ${DESTDIR} if someone says
`make install'.  We have to think about cross-compilers here.
Implemented irix_sys_xstat(). This duplicates some code already present
for svr4 compat, maybe these should be merged..
Sort sections, use Nx.
Punctuation nit.
Sort sections.
Punctuation nits, drop superfluous .Pps.
Punctuation nits.
Sort sections.
Sort SEE ALSO, sort sections, punctuation nit.
Sort sections.
Sort SEE ALSO.
Use Sx, use standard headers, drop a .Pp.
Drop a .Pp.
Use standard headers, punctuation nit.
Separate xrefs by a comma.
Punctuation nit.
Uppercase and unquote section headers, punctuation nit.