Updated mediawiki/extensions
Project: mediawiki/extensions/CentralNotice  472fdb8867a47f9fac2c5b9aca7107df900b05af
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VarBinary is Moar Efficient than Text

Re Asher; changing to a varbinary will save us space over a text
type if the common usage of this column is strings less than 256
bytes in length.

Change-Id: I2f442bba1cc82431a814c676782e3d47ade8192f