Add catman, makewhatis functionality.  Print an error if the whatis database
is missing.

*** 25,38 ****
--- 25,41 ----
  dir path=usr/lib
  dir path=usr/share
  dir path=usr/share/man
  dir path=usr/share/man/man1
  dir path=usr/share/man/man5
+ file path=usr/bin/catman mode=0555
  file path=usr/bin/man mode=0555
  file path=usr/bin/mandoc mode=0555
+ file path=usr/lib/makewhatis mode=0555
  file path=usr/lib/mandoc_preconv mode=0555
  file path=usr/share/man/man1/apropos.1
+ file path=usr/share/man/man1/catman.1
  file path=usr/share/man/man1/man.1
  file path=usr/share/man/man1/mandoc.1
  file path=usr/share/man/man5/eqn.5
  file path=usr/share/man/man5/man.5
  file path=usr/share/man/man5/mandoc_char.5