Update cauldron and add cert name validation for tlsa issue #42

[sei-vsarvepalli]

Addressing issues raised https://github.com/letoams/hash-slinger/issues/42

• tlsa: Add /usr/share/dns/root.key to cauldron
• tlsa: Give warning on TLSA create routine for certificate name mismatch to hostname provided Vijay

[stoecker]

For the changelog: Please add your name in brackets for the changes and replace the date with ..____ (in don't plan to do a release right now).

[paulwouters]

Yes, please use (unreleased) as the date.