Merge commit 'mem'

* commit 'mem':
  view: more culling for search threads
  over: cull unneeded fields for get_thread
  searchmsg: remove unused fields for PSGI in Xapian results
  searchview: drop unused {seen} hashref
  searchmsg: remove Xapian::Document field
  searchmsg: get rid of termlist scanning for mid
  httpd: remove psgix.harakiri reference

diff --cc lib/PublicInbox/HTTPD.pm
Simple merge

diff --cc lib/PublicInbox/SearchIdx.pm
Simple merge

diff --cc lib/PublicInbox/SearchMsg.pm
Simple merge