[Wikitech-l] Default signature

[xaosflux]

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Users can set their signatures for pretty much whatever they want
them to be, so a fix would need to encompas any characters parsed. 
OTOH, why whould anyone need to be including a signtaure as a
parameter to a template?

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iQA/AwUBRaBCXNRQDZCQNK6YEQIX2ACg6WxsSRt7/A5whmJAySZNbOP32U4AnAwl
tcpY0J7RY45c1U9zUiPNDFPB
=qQTY
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