Log Message:
Update to 2.1.2. From the RELEASE_NOTES:

	LIBDKIM: At the end of dkim_eoh_verify(), don't overwrite any existing
		descriptive error text before returning on verification
		errors.  Problem noted by Andy Fiddaman.
	LIBDKIM: Remove redundant assertion of length limits in
		dkim_canon_bodychunk().  The code in dkim_canon_write() has it
		correct, so use that instead.  Problem noted by Mark Martinec.
	LIBDKIM: Fix bug #SF1777332: Fix "relaxed" body canonicalization.
		Some code from the older implementation was still present
		conflicting with the newer code.  Reported by Andrey Chernov.