Installation method for OpenIDConnect & PluggableAuth MW extension is not sustainable

[rht]

The links in

aqua-PKC/aqua/install_pkc.sh

Lines 75 to 78 in 93a6e41

	# https://www.mediawiki.org/wiki/Special:ExtensionDistributor/OpenIDConnect
	(cd extensions && curl https://extdist.wmflabs.org/dist/extensions/OpenIDConnect-REL1_39-194d805.tar.gz > aaa.tar.gz && tar xf aaa.tar.gz && rm aaa.tar.gz)
	# https://www.mediawiki.org/wiki/Special:ExtensionDistributor/PluggableAuth
	(cd extensions && curl https://extdist.wmflabs.org/dist/extensions/PluggableAuth-REL1_39-1884a12.tar.gz > aaa.tar.gz && tar xf aaa.tar.gz && rm aaa.tar.gz)

were recently garbage-collected by the MW website, and I had to manually update them just now. Needs a way to automatically get the latest compatible version, or to have a pinned stable version. Not sure how.

[it-spiderman]

Done with

#130
inblockio/aqua-docker-mediawiki#6