Log Message:
Bump version to 1.93:
- Explicitly clear automatic flag for packages user wants installed
  that got pulled in previously.
- Only ignore pkg_summary.gz in local repository if newer files
  with name matching *.t[bg]z exist.  (Otherwise, pkg_summary.gz
  created by pbulk would be ignored because pkg_summary.bz2 is
  newer.)

Okayed by abs@.