Allow to activate pending lists with sympa.pl

[ldidry]

• Small change to --open_list to let it handle pending lists
• Add --show_pending_lists=robot option to print pending lists (with some
  informations)

Fix #637

[ldidry]

🤔 It lacks a --reject-list option though. I’ll try to add it next week.

[ldidry]

In fact, close_list can be used to reject pending list. No need for another option.

@ikedas, @racke, could you review this PR, please ?

[ikedas]

In fact, close_list can be used to reject pending list. No need for another option.

Should we modify close_list handler?

@ikedas, @racke, could you review this PR, please ?

I have added a comment.

[ikedas]

date_epoch is Unix time. It would be better to be:

                $language->gettext_strftime('%d %b %Y at %H:%M:%S', $list->{'admin'}{'creation'}{'date_epoch'});

[ldidry]

Should we modify close_list handler?

No.

Well, in fact, if we want to send a notification to the owner, we should (I don’t know if it would be hard). It should be a --notify option that could be used in combination with --close_list and --open_list. What do you think ?

[ikedas]

Should we modify close_list handler?

No.

Well, in fact, if we want to send a notification to the owner, we should (I don’t know if it would be hard). It should be a --notify option that could be used in combination with --close_list and --open_list. What do you think ?

Oh sorry I see. You already have added mode attribute.
Currently --open_list does not have --notify option, and I think --close_list may also not have it.

I'll approve this pr and merge it later.