Make the plugin uninstall message a bit more reassuring
Make the plugin uninstall message a bit more reassuring

Moriel pointed out that the original message I wrote looked like
a built-in system message. Add a phab link that will hopefully reassure
folks that this is not an evil trick being played on them by Vagrant or
Q or another evil genius planning on destroying their work productivity.

Other ideas included:
* "All the cool kids are uninstalling the mediawiki-vagrant plugin"
* "This is your MediaWiki Vagrant speaking: ..."
* "ALERT! ALERT" 
* "You will not be eaten by a grue. Probably"
  "And we take no responsibility if you are."

Change-Id: I5bf6926f9a45953c2a06ba5db7df5bc927051fcb

wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant