Description:
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Please upgrade the 'additional_paramters' to allow plural paramters again (I used to be able to use spaces before that wordpress bug made everyone panic)

Maybe change it to mixes to mixed to allow an array of parameters  so that more than one additional parameter can be used, because as it stands escapeshellarg clumps evertthing passed here into a single parameter.


Test script:
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# I would like to be able do do something like this:
mail('test@example.com','test@example.com','test','',array('-f','otherguy@example.com','-odq'));