Simplify and fix RFC 2047 decoding, all its tests pass now.
Simplify and fix RFC 2047 decoding, all its tests pass now.

svn path=/trunk/KDE/kdepim/; revision=497934

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi