Merge tag 'v0.25.0' into archlinux

Alpha 25
Merge tag 'v0.26.0' into archlinux

Alpha 26.
Merge tag 'v0.27.0' into archlinux

Alpha 27
Fix some errors found by coverity

Also fixed some indentation
Merge branch 'archlinux'
Add support for multi-part IPC messages
Fix a warning
Fix NaCl build
Set vm_game to 2 (TYPE_NATIVE_EXE) by default.

Revert Debian changes which set this by other means.
Make VM takes its cvar args from statically defined params

Also renames vm_game to vm.game.type
Disable the warning print on SV_SetConfigStringRestriction
Use Cvar::SetValueForce for sv_cheats
Clear unneeded CVAR_ROM flags for game cvars
Execute config files that might not exist with exec -f
Changelog datestamp.