* add achievement data to netplay save state
* honor achievement state from netplay server
* keep processing achievements if menu doesn't pause game
* remove unused variable
* only CRC coremem
* force send savestate on join and hardcore change
* allow hardcore enablement to be synced to clients
* still calculate cheevos_size for non-server
* use appropriate buffer
* optimizations for when achievements are disabled
* support interfacing with older protocols
* formatting
* c89
* ensure game placard is loaded on main thread
* show on-screen indicator while disconnected
* show server unreachable message in achievements menu
* remove comment
- 'Unlocks/Mastery' split into two options
- 'Account/Login Messages' split off from 'Verbose', gated all login success/error messages
- menu_cbs_sublabel.c - Now in same order as menu options
- menu_setting.c - VISIBILITY_UNLOCK default value now uses define
- All suggested text/cleanup changes from Jamiras
- Startup Summary split off from Verbose Mode, added option to hide for games with zero core cheevos
- Some existing options moved into this submenu
- Leaderboard-related options coming in future PR
slock_lock/slock_unlock seem needless anyway, so we just reference slock_lock/slock_unlock directly and put it behind
HAVE_THREADS ifdefs so the user/programmer knows what is going on
