squash 12-whitespace into 08-whitespace

since 12 caught a line that 08 had missed.
squash 07-whitespace into 02-whitespace
18-missing-objects: use SP{2} after period
18-missing-objects: subject should mention missing-ness
09-fix-cap: drop NUL SP -> NUL hunk
04-casing: reference rfc 2119
normalize ABNF indentation to pack-protocol.txt

This used to be done in 08-whitespace; squash it into 02-whitespace,
since we don't want to drop all tabs.
22-extra: drop unrelated indentation
add new patch, drop 12-spacer
18 becomes response fixer
drop spacer patches
add nguyen
13: add context
13: drop submodule example
13: detail importance of example
new patch