* openbsd_pkg: Use correct part of name in match.
Previously this part of the code could assume that the name was a stem
with nothing else attached (like "autoconf"). With the introduction of the
branch syntax ("autoconf%2.13") this is no longer true.
Check if the package name was identified as using a "branch" style name,
and base the match on the leading part of the name if that is the case.
While here remove unnecessary "pass" and tidy up debug log message.
Problem reported by @jasperla.
* openbsd_pkg: Add missing "." in comment.
* Fix bug where we were actually checking for the availability of the
requested package name and not 'sqlports' even if that was the goal.
* Add check that the sqlports database file exists before using it.
* Sprinkle some debug messages for an easier time following the code when
developing.
* Such package names requires at least OpenBSD 6.0.
* Rework get_package_state() to use 'pkg_info -Iq inst:' instead of 'pkg_info -e'
because it understands the branch syntax. It also means we can get rid of
some additional special handling.
This was suggested by Marc Espie:
http://marc.info/?l=openbsd-tech&m=146659756711614&w=2
* Drop get_current_name() because the use of 'pkg_info -Iq inst:' in
get_package_state() means we already have that information available without
needing to do custom parsing. This was also necessary because a name such as
"postfix%stable" does not in itself contain the version information necessary
for the custom parsing. pkg_info -Iq translates such a name to the actual
package name seamlessly.
* Add support for finding more than one package for the supplied package name
which may happen if we only supply a stem.
