delete spurious reference to MAP_WRITE

back out the restriction that offset be page aligned

note that pos should be a multiple of the pagesize,
fd must be -1 for MAP_ANON, document various EINVAL conditions

4.4BSD snapshot (revision 8.1); add 1993 to copyright

fix comment out of MMAP_FILE

delete MAP_FILE, it's the default, no longer needs to be specified

second arg to mmap is a size_t

`an' should have been `and'

first cut at a real man page, convert to new-style macros

date and time created 91/05/27 21:44:42 by mckusick