Very large style makeover.
- ANSIfy.
- Clean up ifdefs so that a) ones that never/always apply are appropriately either fully removed, or just the #if junk is removed. b) change #if defined(FOO) for appropiate values of FOO. (currently AUTHENTICATION and ENCRYPTION)
- WARNS=2 fixing
- GC other unused stuff
This code can now be unifdef(1)ed to make non-crypto telnet.