Rename faFoo() routines, use FD_t I/O with fadio cookie throughout.

Rename faFoo() routines, use FD_t I/O with fadio cookie throughout.
Try to be URL sensitive on filename arguments throughout.
falloc.c: Eliminate faFile, use FD_t.
falloc.c: preserve abstract FD_t by creating fadGet*()/fadSet*().
macro.c: rpmGetPath() expansions were clobbering URL's.
rpmio.c: create Fcntl(), Pread(), Pwrite() from previous faFoo().
rpmio.c: attempt per FD_t debugging.
rpm.c: permit --dbpath with --rebuild.

CVS patchset: 3408
CVS date: 1999/10/30 21:26:45