Spelling cleanup.
No functional changes, just fixing minor spelling issues.
Most of these were identified from the command line by running:
codespell \ --ignore-words-list fpr,stati,keyserver,keyservers,asign,cas,iff,ifset \ --skip '*.po,ChangeLog*,help.*.txt,*.jpg,*.eps,*.pdf,*.png,*.gpg,*.asc' \ doc g13 g10 kbx agent artwork scd tests tools am common dirmngr sm \ NEWS README README.maint TODO
- Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>