...which is a lot! This ended up touching a lot of code, especially
when it spread to Cmd_Argv, etc. Mostly just propogating the correct
const qualifiers on pointers, but in some cases it was appropriate to
copy the buffer to e.g. lowercase filename in SV_BeginDownload_f or
re-write parts of functions where the buffer modifications was not
strictly needed (e.g. the *Say* functions).
I guess of note is that I now accept a const pointer into Z_Free,
which shouldn't be a problem since it doesn't modify the data pointed
to at all, just marks it as free.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
