Added a little extra info to two bmpman errors.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11160 387891d4-d844-0410-90c0-e4c51a9137d3
Clarified how to set a new variable with mn.SEXPVariables.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11161 387891d4-d844-0410-90c0-e4c51a9137d3
Fixed a FRED crash when using $Flight controls follow eyepoint orientation (patch by MageKing17).

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11163 387891d4-d844-0410-90c0-e4c51a9137d3
gr_opengl_string retooled to use glDrawArrays. Should be a bit faster now.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11165 387891d4-d844-0410-90c0-e4c51a9137d3
Minor followup to r11150.

The regular parsing code not using the same broken logic as parse_comments() is not the same thing as it "ignoring" too high versions, and searching for repetitions of the same token would result in just finding the first one over and over again (the likelihood of this actually mattering to anyone is minuscule, but I needed something to test commit access, and this code has been tested).

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11167 387891d4-d844-0410-90c0-e4c51a9137d3
With help from MageKing17: Fix for Mantis 3123: Virtual variables and indexers that return nil break the scripting system

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11168 387891d4-d844-0410-90c0-e4c51a9137d3
Redo Coverity 1215458 Uninitialized pointer field

Includes more robust checks of cmdline_parm data

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11169 387891d4-d844-0410-90c0-e4c51a9137d3