Merge branch 'jk/ref-filter-lrstrip-optim'

Code clean-up.

* jk/ref-filter-lrstrip-optim:
  ref-filter: clarify lstrip/rstrip component counting
  ref-filter: avoid strrchr() in rstrip_ref_components()
  ref-filter: simplify rstrip_ref_components() memory handling
  ref-filter: simplify lstrip_ref_components() memory handling
  ref-filter: factor out refname component counting

diff --cc ref-filter.c
Simple merge