Clean up code indentation.
These are mostly automated changes corresponding to the emacs settings: (c-set-style "linux") (setq c-basic-offset 2) (c-set-offset 'case-label '+) Most of the code follows the convention: (add-to-list 'c-cleanup-list 'space-before-funcall) but this is not enforced by this indentation cleanup. Also, I personally dislike tabs, so I have: (setq-default indent-tabs-mode nil) in my own configuration. However I have no desire to change every line just for that effect. So this cleanup does nothing about the mix issue. Some of the secondary files (e.g. regex.c) have been skipped. I've also skipped crypt-gpgme.c, because I need to think about that file. Werner Koch and the GnuPG team contributed most it, and it follows the Gnu indentation settings. It should probably be made uniform with Mutt, but I don't want to discourage future GnuPG contribution to the file. I manually reverted a few unsightly cleanups, and added a few tweeks when I saw things that could be improved.