Adding strlcpy and strlcat replacements to libradius

[Nicolas Baradakis]

Alan DeKok wrote:

>   That would involve fixing the headers to avoid things like #ifdef
> HAVE_FOO.  I don't want to make the same mistake the net-snmp people did.

For now libradius.h includes autoconf.h, which is annoying for the
people who want to use the libradius in an external program. And it
seems it's not needed: for me the server compiles successfully with
the #include "autoconf.h" removed from src/include/*.h.

-- 
Nicolas Baradakis