Santuario xml-security-c 1.7.3 release candidate posted, call for vote

[Cantor, Scott]

I've uploaded a release candidate of the 1.7.3 patch release [1] for the vote. 
There have been no changes since the beta last week and I've encountered no 
issues testing it.

This is my +1.

-- Scott

[1] https://people.apache.org/~scantor/