work for directory specifications (this will be reported as a bug to
DEC^H^H^HCompaq).  It could as well be removed for all others as well,
since stat() and open() will return appropriate errors as well, but I
leave that to someone else to decide.

tad more readable.

and add example of extension aliasing. Also fix
the extension aliasing because it didn't work :-)

generator (otherwise they don't work) and add -rand
option. Update docs.

accessability of an "empty" directory.  Thsi *is* weird, and a better
solution will be provided in apps/ca.c, when I get time to hack at it.

-Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline''.

amend docs.

This better reflects their behaviour.

qualifier in asm definitions as it prevents compiler from moving
the instruction(s) during optimization pass.

macro

and initialize too_many because memset(..., 0, ...) is not used here.