Add a test catching charset detector bug: X-.. charset names are incorrectly replaced with windows-1252; x-user-defined is not replaced (test fails).
[WWM-139]
FIX X- charset names are incorrectly substituted by windows-1252. Does not substitute x-user-defined.
(iso-8859-1 is substituted by windows-1252, instead of cp1252, for the sake of consistency).
(Fixes WWM-139)
Merge branch 'charset-detector'