Display HUD messages over "dead state" info
Fix - send warning message only to spammer changing name/skin
Fix reset of packages source servers list

Earlier "resetpckservers" command cleared this list, instead of reset
to the initial settings.
Add the clock to scoreboard and change clockdisplay

Commit adds the clock in format mm:ss to scoreboard, instead of
"X minutes remaining" info.
It also enables default the clock on the HUD and adds clockcount variable,
which let to choose between counting forward or backward in the clocks.
Fix gonext command and do it random

Commit fixes broken "gonext" command, reading time from maprot, and does
result of this command random.
It also removes get_next() function, because it messes up the maprot
and won't be already used.