Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  50f128239befedaf270dbaa43fd2c23bdaa754ac

More robust API error reporting

Single private apiErrorMessage() function handles other failure codes
than 'http'.

Bug: 68474
Change-Id: Id0201c0c9cf8f003d7619f0328a1b4222c3a16a4