qrencode_kdl: a KDL-specific version of qrencode library
qrencode_kdl: updated recipe that includes the headers
qrencode addon: use KDL-specific qrencode library

Fixes #11351
Radeon: fix warning.
MessageFormat: Add test for Russian and fix Polish ones.
MessageFormat: use language and ignore formatting conventions.

The formatting conventions shouldn't change the rules used for singular/plural.
readline: enable mark-symlinked-directories

This allows "ls /sys<TAB>" to complete to "/system/" rather than
"/system". It restores the behavior as it was before we outsourced bash.
readline: also restore behavior for directories.

Thanks to Diver for checking.