further documentation patches

[Bruce]

Good morning,

Attached are 2 more documentation patches, one for libc/manual and one 
for libc/linuxthreads.  ChangeLog entries below.

Cheers,

  - Bruce

2001-05-25  Bruce Mitchener  <bruce@cubik.org>

         * manual/ctype.texi: Minor fix.
         * manual/install.texi: Likewise.
         * manual/startup.texi: Likewise.
         * manual/examples/dir.c: Use perror() rather than puts().

2001-05-25  Bruce Mitchener  <bruce@cubik.org>

         * linuxthreads.texi: Spelling corrections.