Add global acme reload command (#822)

[FliegenKLATSCH]

Description

Add a setting to pass the --reloadcmd to acme.sh

Fixes #822

Type of change

• New feature (non-breaking change which adds functionality)

[d00p]

Shouldn't that be domain-specific not globally? In your example, dovecot and postfix would get restarted for EVERY certificate renew of every domain

[snoopotic]

Yeah, I also reuse one of my LE certificates for the mailserver.
Maybe there can be a setting: "used for Mailserver" and only if this cert gets renewed, mailserver services get restarted.

[d00p]

pretty specific that way...what if i have some other services running with one of my froxlor-administrated domains and wanted to reload these after renew?
But dangerous, as i would NEVER allow a customer to enter a reload command to be run on the server after certificate renew.

[FliegenKLATSCH]

I agree, this setting should not be visible to any customer. Are those serversettings visible to them?
The proposed description says that it is executed for each certificate. For me that's fine, the reload doesn't hurt and I don't have that many domains..
If someone wants to restrict this, it could be possible with [ "${Le_Domain}" = "example.com" ] && systemctl reload postfix.service in that setting (see https://github.com/acmesh-official/acme.sh/blob/master/acme.sh#L5867)