SSL (https://) Option and Certificate Alert Banners

Features

• SSL (https://) option now available using server key and certificate, or create your own. http:// can be disabled if desired.
• Alert banners have been added for adding, revoking or removing certificates in colors matching the buttons for those activities.

Fixes

• Memory and swap usage was no longer accurate with Debian 11 as a base using the Gosigar library, so a new function was developed.
• Incoming and Outgoing traffic was affected by the above change, so functions were reworked.
• Status page refresh rate changed to 60 seconds.

Documentation

• No changes.

v1.1.0: Merge pull request #14 from bnhf/develop-2

Features

• Certificate revocation and removal
• Certificate passphrase encryption

Fixes

• DNS servers now optional in config (server.conf)
• Code cleanup in lib/certificates.go

Documentation

• Additional "help blocks" for configuring management interface
• Updated README to include OpenVPN 2.5.x or above requirement
• Created Wiki for configuring management interface using Docker host gateway rather than LAN