This fixes Setup.hs so that building just the library with cabal doesn't
fail, which is necessary for darcs to be used as a cabal subproject e.g.
when builing darcsden. The fix is simply to check whether the files we
expect are actually there when building or installing the manpage and
otherwise do nothing. Previous attempts (by me) to find out which targets
are actually being built using the Cabal library don't work and have been
removed.
1 patch for repository http://darcs.net/screened:
patch 592492b6b0ca524cf154ede4fcb0b902eb596ad0
Author: Ben Franksen <ben.franksen@online.de>
Date: Wed Feb 12 12:58:10 CET 2020
* fix manpage generation in Setup.hs and clean up imports