[ITA] protobuf

[Achim Gratz]

The protobuf package is orphaned by Reini Urban and hasn't been updated
in quite a while.  The package currently provides version 2.5.0 and API
version 8, while the current upstream is at version 3.3.1 and API
version 13.

Aside from fixing a bad assumption in configury via patch and changing
the runtime package name to conform to the API bump, the package uses
the original cygport file.  Upstream doesn't provide any tests, I built
a new version of mosh using the -devel package and that works just as
well as with the older version.


Regards,
Achim.
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