mail/sympa: Import upstream patch to fix warnings with perl 5.40

Import [1] to fix the following warnings:
Starting module bulk.pl: Duplicate specification "foreground|F" for option "f"
Starting module archived.pl: Duplicate specification "foreground|F" for option "f"
Starting module bounced.pl: Duplicate specification "foreground|F" for option "f"
Starting module task_manager.pl: Duplicate specification "foreground|F" for option "f"

[1] https://github.com/sympa-community/sympa/commit/088fff6ba62e229939c0213c7f44b4086d38709c

PR:		288112
Approved by:	Geoffroy Desvernay (maintainer)