Rename three keys.

These names are slightly shorter and a bit more descriptive IMO, and
now (when they are still fresh) is the best time to rename these
keys.

`hs_intro_tid` becomes `hs_ipt_sid`: It is a _session identifier_
key used with an _introduction point_.  Using `ipt` here emphasizes
that it is not part of the introduction _handshake_.

`hs_intro_ntor` becomes `hss_ntor`. The extra "s" means it is owned
by the service. Renaming "intro" here removes the implication that
it is held by or used by the introduction point.

`onion_ntor` becomes `ntor`: There is no such thing as an ntor key
that is not an onion key.

0 files changed, 0 insertions, 0 deletions