Bug#839118: ghostscript: CVE-2013-5653: getenv and filenameforall ignore -dSAFER

[Salvatore Bonaccorso]

Control: severity -1 serious

Rationale for severity increase: We ship DSA-3691-1 in jessie
containing the fix, and not having the security fix in stretch then
would be a regression.

Regards,
Salvatore