* fatal error if RMD160 missing
* --autofix
* pkglint <package>...
* fix false positive warnings
* @deprecated_variables
* add checks for buildlink3.mk files
* stricter type checking
* quoting check for Makefile variables
* -E/--explain
* check for C/C++ style comments in Makefiles
  rm -f *.o		/* delete unused files */
  .ifdef foo		/* xyz */
* check for absolute paths
* check for direct use of /usr/pkgsrc etc.
* check dir direct use of *DIR
* in dependency lines check for ../../category/package, not ../package