Merge branch 'jc/revision-parse-int'

The command line parser for the "log" family of commands was too
loose when parsing certain numbers, e.g., silently ignoring the
extra 'q' in "git log -n 1q" without complaining, which has been
tightened up.

* jc/revision-parse-int:
  revision: parse integer arguments to --max-count, --skip, etc., more carefully

diff --cc revision.c
Simple merge

diff --cc t/t6009-rev-list-parent.sh
Simple merge