xtld

xtld is used at run time in 7 crates (of which 2 optionally). It is a direct run-time dependency in 3 crates.

Depender (with downloads and own rev deps)			xtld version
150	1	t3		^0.1.6
140		xmail		^0.1.6
750	1	header_host	optional	^0.1.6