Merge branch 'next'

* next: (23 commits)
  fix, PEBKAC, use build in src dir for clitoris tests
  chore, PEBKAC, delete ute files generated by info tests
  chore, PEBKAC, delete ute files generated by print tests
  chore, PEBKAC, delete ute files generated by mux tests
  minor, provide --files to ute-info(1) to add file names to the output
  test, major, switch from ut-test.sh tests to clitoris tests, part 4
  chore, update clitoris tools, import hxdiff(1)
  test, major, switch from ut-test.sh tests to clitoris tests, part 3
  test, major, switch from ut-test.sh tests to clitoris tests, part 2
  chore, update clitoris tool to support word expansion
  test, major, switch from ut-test.sh tests to clitoris tests
  chore, import clitoris tool
  test, chore, adapt .ggo generator rule for ut-test tool
  minor, round the guessed interval frequency onto a sequence that makes sense
  minor, implement --guess'ing for candles without start timestamp
  fix, PEBKAC, base texi pages on .ggo files (too)
  minor, refactor info mark() routine into mark_ssnp() and mark_scdl() coroutines after yielding the main mark work
  chore, PEBKAC, ship .ggo files
  fix, PEBKAC, base man pages on .ggo files
  minor, provide --guess to ute-info command for interval guess work
  ...