Add a lens for /etc/shadow file management
Add a lens for /etc/gshadow file management

  with a minimal testfile
Reuse already defined stuff.
Cosmetic

  Remove  extra space, and align to nearby lines
Merge branch 'shadow_files' into lmc_integration
Wire-up shadow-files test with the test-runner
Work-around for bison3
Merge branch 'shadow_files' into lmc_integration
Merge branch 'crude_bison_workaround' into lmc_integration
Add mock /etc/shadow and /etc/gshadow files

  to the test filesystem. The shown root password has been generated
  using 1000 rounds of glibc's SHA-256 algorithm on an empty string.
Put the list entries at top-level

  following the lead from group.aug
Reuse some more already defined stuff

and add \r to the excluded chars in sto_to_col
Merge branch 'Passwd_refactor' into lmc_integration
Merge branch 'shadow_files' into lmc_integration
Merge branch 'lmc_integration' of github.com:lmctv/augeas into lmc_integration

Solved conflicts in:
	lenses/gshadow.aug
	lenses/shadow.aug