* ext/tmailscanner/tmail/tmailscanner.c: constified.
* ext/tmailscanner/tmail/tmailscanner.c: conform to allocation framework of 1.8.
* ext/tmailscanner/tmail/tmailscanner.c: conform to m17n of 1.9.
* ext/tmailscanner/tmail/tmailscanner.c (cstr2symbol): use optimizable version.
* ext/tmailscanner/tmail/tmailscanner.c (mails_type): use typed data.
prevent failure in case of non-utf8 subjects
Fix unquoted email spec parsing.
Merge remote-tracking branch 'a2exsh/master'
Merge remote-tracking branch 'samanage/master'

Conflicts:
	lib/tmail/quoting.rb