Merge remote-tracking branch 'origin/debugger/tdm_netscore'

# By Debugger
# Via Debugger
* origin/debugger/tdm_netscore:
  rename net into sum
  removing an autocvar I forgot; branch is ready to be merged
  removed matchend sound (wrong commit in here)
  disable 'net' by default
  wrong calculation fixed
  simplified, parallel to SP_FRAGS now
  small bugfix
  new default scoreboard for tdm
  removed unnecessary 'num1' declaration
  replaced the <tab>'s by <space>'s
  added a 'net' column to the tdm scoreboard (enabled by default)
  added a sound when the match ends