Log Message:
Update to 1.18.18. From the changelog:

1.18.18:
- Replace deprecated egrep with grep -E. Thanks, Sam James
- Added support for Void Linux's xbps package manager. Thanks,
  Zev Weiss.

1.18.17:
- Fix committing of files with spaces in name when perl is not
  available. Thanks, Henrik Riomar
- Ignore udev's FHS violating large binary cache file /etc/udev/hwdb.bin
- Avoid warning messages from grep about binary files when there are
  filenames in /etc that do not correspond to the current locale
  settings. Thanks, thm

pkgsrc changes:
- Adjust installed bash-completion location to match other packages
- Use MAKE_DIRS instead of OWN_DIRS so unchanged files are uninstalled
- Take MAINTAINER