sanitizer patch to allow <a> tags
Allow <a> tags in wikitext. This was introduced first in r58694 and again discussed in the context of but reverted. I have again introducde it in r109723 after a discussion with tim, but reverted it because of code slush as requested by siebrand.
The attached patch will allow <a> tags to be passed through the sanitizer, if $wgAllowATag is set to true. I will soon supply another patch that will cause such links to be recorded in the externallink table, as discussed with tim.
Please apply once 1.19 is forked.
attachment allow-a-tag.patch ignored as obsolete