[SP] Fix out of bounds array access in R_FogFactor

R_FogFactor was accessing out of array bounds due to the s texture
coordinate being NaN. This follows from using a zero-length axis to
calculate the vertex positions for a cylinder fx, which was then used in
a foggy scene.

This commit corrects problems in all of the EFX update functions, which
continued to render the EFX, even when its orientation (represented by
a 3 axes) could not be determined.
[MP] Fix force regen debouncer causing hitch with long uptime
[MP] Proper bounds checking on g_maxForceRank
[MP] Fix #453: assertion when NPC jumps up

The assertion was triggered when the NPC attempts to jump directly
upwards.
Merge branch 'master' of github.com:JACoders/OpenJK
[MP] Fix #395: NPCs jump state not being set

This commit fixes the problem with NPCs not jumping when directed through
an ICARUS script. The problem stems from the signedness of enums being
implementation-dependent, and where bState_t (an enum) was used in a
greater-than comparison against -1. In this case, the enum was unsigned
which caused the comparisons to always return false.

This has been fixed by testing for inequality instead of using a greater
than comparison.
[SP] Fix for NPC behaviour setting on Linux

Similar fix to d252a69.
[MP] Fix #382 - force regen bug with saber throw

The debounce time was not being updated when the saber was being thrown.
This meant that after the saber had returned, the force points were
regenerated as if it started from the point the saber was thrown.
[MP] Clean up forcepowers validation
[MP] Fix spectators getting stuck with force grip movement speed. Clean up some bg_pmove stuff.
[MP] Adjusted name filtering. Don't allow control characters, fix @@@ filtering
[MP] Meta: Remove unnecessary comments and names