Fixes the missing straps on the Medic's LOD models that would otherwise cause backface culling and tweaks some of the sharp edges to fit this change.

Edited files:
> medic.mdl
>>medic_morphs_low_lod2
>>medic_morphs_low_lod3
>>medic_morphs_low_lod4
>>medic_morphs_low_lod5
>>medic_morphs_low_lod6