test, provide regression test file for non-{pre,suf}fix matching

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'core/glep'

* core/glep:
  test, provide regression test file for non-{pre,suf}fix matching
minor, don't barf on 0-byte files, instead pretend to mmap() a buffer for them

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'core/fops'

* core/fops:
  minor, don't barf on 0-byte files, instead pretend to mmap() a buffer for them