is not legal (but happens to work on Linux) to do proper
low-level file descriptor mangling which is portable. (Anton)
- Add test/runlist-data to EXTRA_DIST so it gets included in the
distribution otherwise make test fails on released sources. Solution
is not perfect as it also adds the test/runlist-data/CVS directory
but it will do at least for me. (Anton)
test case 16, where a run is added beyond the end of a file, now behaves
differently. the discontinuity (gap) is now filled with a "not mapped"
run (before the preceding hole would have been extended).
Anton's bugfix applied and tested
minor code tidyups
loads more comments in runlist_{insert,append,split,replace}
test cases checked and updated where necessary
valgrind happy
