This commit adds a verification before setting the servername console
variable. We now check that it fits within the MAXSERVERNAME length and
we cancel setting it if it doesn't.
Letting the servername be more than MAXSERVERNAME could lead to crashes
when trying to edit the server name from the menu so, we now avoid
those.

There was a possible buffer overflow if you tried setting a console var
that had the CV_NETVAR and that was of the string type.
The overflow would happen if you were trying to set the console variable
while in a multiplayer / netgame state.

This commit just increases the size of buf to account for everything
that needs to be written to it.

Fix backwards compat for SPR2 Super (resolves #1225)

Closes #1225

See merge request STJr/SRB2!2410

Fix buffer overflow when invoking MusicChange hook

See merge request STJr/SRB2!2441

Fix SOC freeslotting including trailing spaces in constant names

See merge request STJr/SRB2!2415

Sprite names up to 64 character long and 256 frames per sprite

See merge request STJr/SRB2!2394

replace CPM with vcpkg

See merge request STJr/SRB2!2321

Make Extra Time powerup work in old-style special stages

See merge request STJr/SRB2!2292

Support LF_MIXNIGHTSCOUNTDOWN for old-style special stages

See merge request STJr/SRB2!2291

Fix softlock on old special stages when running out of time due to being hit

See merge request STJr/SRB2!2398