mapistoreURI encoding should be done the same way as listContextForUser

stringByEncodingImap4FolderName is used inside [newFolder create] where is needed
no need to modify url
fix format logging uint64_t
stringByDecodingImap4FolderName is not neccesary

For russian locale and characters nonexistent in latin1 sogo crashes
Merge pull request #2 from Zentyal/jgarcia/fix-encoding-of-mapistoreuris

Support folders with non-ascii characters