Make CATWIDTH override MINCATWIDTH/MAXCATWIDTH

Otherwise setting `CATWIDTH` to something larger than 80 confusingly
doesn't work unless you also set `MAXCATWIDTH`.

Fixes https://gitlab.com/cjwatson/man-db/-/issues/9.

* src/man.c (add_roff_line_length): Skip terminal width range check if
`cat_width` is set.
* man/man5/manpath.man5 (FORMAT): Remove note that `CATWIDTH` should be
within the range set by `MINCATWIDTH` and `MAXCATWIDTH`, and instead say
that it overrides them.
* NEWS.md: Document this.

1 files changed, 2 insertions, 0 deletions

diff --git a/NEWS.md b/NEWS.md
index bbfe25ee..d4c51440 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -6,6 +6,8 @@ Fixes:
  * `mandb` now correctly records filters in the database if it uses cached
    whatis information.
  * Upgrade Gnulib, fixing syntax error on glibc systems with GCC 11.
+ * The `CATWIDTH` configuration file directive now overrides `MINCATWIDTH`
+   and `MAXCATWIDTH`.
 
 Improvements: