directly into the packet data.
- change a bunch of char *'s to const char *'s for the above. Only
thing that had trouble was the cl_nofake handler, which I changed to
use a local buffer.
- add MSG_ReadStaticString which acts like the old MSG_ReadString,
specifically that it uses a static buffer and tollerates
unterminated strings.
- add a Q_strnlen function, and make strnlen use it if strnlen is
undefined.
- Add a net_svc.h and net_svc.c which will preparse svc messages into
structs, for easier handling. Currently only soundlist and
modellist are done.