WIP: support different interface types: improve placeholder values, allow bulk user creation for external email addresses

WIP: support different interface types: many fixes and improvements...

WIP: support different interface types: update config templates

WIP: support different interface types: server, client and custom. Show different UI for each type.

WIP: support different interface types: server, client and custom. Show different UI for each type.

update readme, fix default env file

fix TLS for email sending

make ldap cert check configurable, fix CodeQL warnings

add csrf

fix redirect after sending the peer email

fix user_edit template

migrate peer database

fix mail template (#3) and rename some variables, also change default ordering (latest handshake first)

WIP: support for multiple WireGuard devices (#2)

fix potentially unsafe external link

fix ldap provider, disable gin logs by default

fix ldap sync for disabled users, check if admin username is an email address, rename username to email

Create codeql-analysis.yml

migrate old database format correctly, fix typo, update readme

fix docker build

cleanup

add travis token

fix travis

WIP: dont use gox

WIP: use gox for cross platform compiling, try to enable cross platform cgo builds

WIP: use gox for cross platform compiling

WIP: new user management and authentication system, use go 1.16 embed

WIP: context for clean shutdown

rename user to peer

cleanup, typos, ...