Merged model point shields from zookeeper branch.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10135 387891d4-d844-0410-90c0-e4c51a9137d3
scramble messages on a per-ship basis

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10136 387891d4-d844-0410-90c0-e4c51a9137d3
Remember to initialize shield_point_augment_ctrls.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10137 387891d4-d844-0410-90c0-e4c51a9137d3
Fix an actual Volition bug.  This has AI balance implications, but it's already in the "pick a random weapon" section, so it will probably be all right.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10138 387891d4-d844-0410-90c0-e4c51a9137d3