mediawiki-1.19.6 port filesize mismatch

[klaasdemter at gmail.com]

Dear port maintainer,
it seems mediawiki has rerolled their 1.19.6 distfile. I checked the 
contents, diff -r shows no differences on the extracted data - so I'm 
not sure what they did. There was no announcement to mediawiki mailing 
list as far as I can tell.

Current distfile would be:
SHA256 (mediawiki-1.19.6.tar.gz) = 
c5056635c099b8fc7362807047b1bd2e10c2e4fb12904bf4ace3b0b8474693a2
SIZE (mediawiki-1.19.6.tar.gz) = 18550832

Greetings
Klaas