added new option to CTHConstants.ini:
IRON_SIGHTS_MAX_APERTURE_MODIFIER = 3.0
This modifies how fast the aperture grows for iron sights when IRON_SIGHTS_MAX_APERTURE_USE_GRADIENT = TRUE
git-svn-id: https://ja2svn.mooo.com/source/ja2_v1.13_data@2143 4f8fa57e-7814-0410-bad4-adc449f26b7c