Bug 10884

The output page /var/catman/cat1/zshall.1.gz, which is documentation for
the zsh shell, doesn't include all the other zsh* manpages as it should.
The ".so" requests are (in effect) ignored.  Here's what happens when I
format the page:

linus% man -c zshall
Formatting page, please wait...
<standard input>:23: realpath on `man1/zshmisc.1' failed: No such file or
directory
<standard input>:24: realpath on `man1/zshexpn.1' failed: No such file or
directory
<standard input>:25: realpath on `man1/zshbuiltins.1' failed: No such file
or directory
<standard input>:26: realpath on `man1/zshcompctl.1' failed: No such file
or directory
<standard input>:27: realpath on `man1/zshparam.1' failed: No such file or
directory
<standard input>:28: realpath on `man1/zshzle.1' failed: No such file or
directory
<standard input>:29: realpath on `man1/zshoptions.1' failed: No such file
or directory

The ".so man1/xxx" lines have been a standard feature of manual pages for
at least 20 years; they're designed to be read from the parent directory
(in this case, /usr/man).  It looks to me like the man(1) command isn't
formatting from the correct directory?

I think that the zsh manpages had the same problem under Red Hat 6.1.  And
I'd guess that any other manpages using ".so" may have the same problem.