src lint

src lint

Another OS upgrade (OSX 10.6.8 -> 10.8.5) with different toolset,
another change in compiler behavior.  Earlier 'gcc -Wwrite-strings'
didn't complain about passing string literals as 'char *' paremeters
if there was no prototype in scope.  This one found one or two of
those in options.c and several in makedefs.c (fix coming soon in a
separate commit...).  This adds some missing prototypes and reorders
the existing ones to match their order within the file.  There were
also several functions which were declared static in their advance
declarations but not in the definitions, which can be confusing when
reading the source.