[MERGE] Test and document PERL_USE_UNSAFE_INC
authorDagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Sat, 25 Mar 2017 09:35:25 +0000 (09:35 +0000)
committerDagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Sat, 25 Mar 2017 09:35:25 +0000 (09:35 +0000)
Also remove it from the test environment in case it's set by the user.


Trivial merge