Email-adresses in markdown are not parsed correctly

[kolaente]

• Gitea version (or commit ref): 1.3.2
• Can you reproduce the bug at https://try.gitea.io:
  • Yes: https://try.gitea.io/kolaente/tet/wiki/Home

Description

When entering an emailadress in a wiki article, it gets rendered with a normal link tag instead of a mailto: link, sending the user to a non-existent page when he clicks on it.

[kolaente]

Apparently the same issue occures when entering an emailadress inside an issue comment.