Use the slist_free_strings_full wrapper func.
Make INBOX case-insensitive (as RFC states), and add a check for a "Draft" folder when building folder tree. Fixes bug #3221, "Claws Mail has issues with Yahoo IMAP server/folders"
Add missing copyrights in tnef_parse plugin
Add license and copyright to 9b3fd2b5
highlight queue if there are msgs in its sub-folders and the tree is collapsed

as is done for the parent queue folder
RSSyl: fix memory leak in rssyl_deleted
RSSyl: make the libfeed parsers' FILL macro brace-safe. Thanks Colin!
RSSyl: make sure we do not operate with NULL text in libfeed parsers' end-handlers.
RSSyl: remove surplus semicolons from FILL macro use.