[master] globally rename "delve" to "delv" 3817. [func] The "delve" command is now spelled "delv" to avoid a namespace collision with the Xapian project. [RT #35801]

[master] delve 3741. [func] "delve" (domain entity lookup and validation engine): A new tool with dig-like semantics for performing DNS lookups, with internal DNSSEC validation, using the same resolver and validator logic as named. This allows easy validation of DNSSEC data in environments with untrustworthy resolvers, and assists with troubleshooting of DNSSEC problems. (Note: not yet available on win32.) [RT #32406]

[master] clean up tests, update .gitignore

remove lib/export