1.5.7
  - Remove duplicate functions definitions for setuid and setgid()
  
1.5.6
  - Fix a printf warning for CRAN
  
1.5.5
  - Fix strict-prototypes warnings
  
1.5.4
  - Remove examples and test for rlimit_as() and rlimit_data() which give an
    error on MacOS 12 if the value is too low.

1.5.3
  - On linux, eval_fork() no longer tries to kill orphan forks
  
1.5.2
  - Add 'AppArmor' in SystemRequirements to help rstudio/r-system-requirements

1.5.1
  - CRAN fix: do not use CPP in configure

1.5
  - Fix complication on Solaris
  
1.4
  - eval_fork and some more tools have been moved from 'sys' into
    this package.
    
1.1
  - Added geteuid(), seteuid(), getegid(), setegid()
  - Add rlimit_all() wrapper to show all current limits
  
1.0
  - Initial CRAN release