and use message catalogs if NLS is defined.
Increased the size of char buffers used by strerror() and strsignal();
the error and signal strings may be much longer in some locales.
Since perror is not permitted to change strerror()'s static buffer, I have
changed both functions to pass their own buffers to the new library-internal
function _strerror() that actually does the error message string look up.
Split strerror manpage into strerror and perror manpages.
lukem