status of Heimdal in src

hello,

i'm interested in the status of Heimdal in src (src/crypto/heimdal).
although the vendor branch was recently updated, it hasn't been merged
into src for a long time: the current version is 1.5.2, which is over 10
years old.  in particular, this version is missing newer cyphers, like
the SHA2-based algorithms.

is there something preventing a newer version from being merged, or is
it just a lack of someone having time to work on it?  if the latter, i'd
be interested in picking this up (or helping, if someone is already
working on it).

	regards, lexi.