Portmaster updates, including multiple -x options

[Doug Barton]

Howdy!

I just committed portmaster version 2.12 which includes an
often-requested feature, the ability to specify the -x option more
than once. I also added options to the Makefile for installing
programmable completion files for Bash and zsh. avg gave me a great
suggestion for solving the problems with building virtualbox which I
incorporated in this version as well.

In addition to these changes I did extensive testing on the -x option
in regards to the previous thread about it not working in conjunction
with -r. I could not reproduce any failures using -x with -r, however
in tracing the various code paths where -x might come into play I did
find a couple places where it was not being used consistently which
are now fixed.

Finally there is another new option based on a user request. The
--list-origins feature will produce a list of the origin directories
for all of the root and leaf ports installed on a system. This list
can then be used to duplicate the installed ports on another system or
to feed portmaster after deleting all ports for a major version upgrade.

Enjoy these new features!


Doug

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