What changed in EDuke32, build by build

Fix build after big updates in ae4a71a199773d77445a47e6ea80787969b2fd97

Fix warning C4804: '<<': unsafe use of type 'bool' in operation

Fix build

Fix redundant sqr/ksqr functions

Fix -Wformat warnings

Fix unused global variables

Fix -Wuninitialized

Fix -Wlto-type-mismatch

Fix startup crashes

Fix OSD_SetParameters signature.

Fix OS X build.

Fix symbol issues.

Fix mul3 and sqr pragmas.