Alter diazepam functionality re: tetanus.

Now diazepam suppresses the symptoms from manifesting for several hours
after consuming it. Antibiotics are needed to actually cure tetanus.
Diazepam also prevents the 'shakes' condition for its duration.
Gives mininukes a 50% larger blast radius.

Now they can actually take out about 3/4 of a house in one shot. Also
increased launcher range by 50% to compensate for the larger explosion.
Change liquid volume to 1, fixes waterskins
Merge remote-tracking branches 'dda/pr/7907', 'dda/pr/7908' and 'dda/pr/7909' into dda-master

* dda/pr/7907:
  Alter diazepam functionality re: tetanus.

* dda/pr/7908:
  Gives mininukes a 50% larger blast radius.

* dda/pr/7909:
  Change liquid volume to 1, fixes waterskins