Define and use variables used in pkgconfig (.pc.in) input files
Prepare 2.3.7
Improve SWIG detection
Improve error reporting if sfcc init fails (upstream: 3586680)
Add RCP=http://schema.suse.com/wbem/wscim/1/cim-schema/2 to vendor_namespaces
xml_parser_element_dump: fix pointer (github issue #8)
Require SWIG >= 2.0.5

https://github.com/Openwsman/openwsman/issues/7 shows that SWIG 1.3.x
doesn't build the right class constructors for Python
Document minimal SWIG version
Fix Ruby 1.9 threading locks for wsmc_action_* functions

Fixes https://github.com/Openwsman/openwsman/issues/9

Ruby 1.9 introduces 'real' threads which need special consideration if
a called C function is long running (i.e. doing I/O)

See http://www.spacevatican.org/2012/7/5/whos-afraid-of-the-big-bad-lock/
and esp. http://media.pragprog.com/titles/ruby3/ext_ruby.pdf