Log Message:
Update to 3.21

Upstream changes:
version 3.21: Wed 11 Jan 10:02:19 CET 2017

	Fixes:
	- XOP hooks were instated, even though XML::Compile::XOP was not.
	  Schema/WSDL compilation will be a little faster now.
	  https://github.com/mjgardner/xml-compilex-schema-loader/issues/1
	  [Slaven Rezi�]
	- constant name: XS_DAEMON_NS -> XC_DAEMON_NS
	  rt.cpan.org#119800 [Pavel Trushkin]

	Improvements:
	- spell fix Debian rt.cpan.org#118577 [Gregor Herrmann, Debian]