This update for enigmail to version 2.0.9 fixes the following issues:

Security issues fixed:
  * An HTTP authentication dialog maybe displayed during web key
    discovery, allowing remote attackers to possibly trick the user
    into entering e-mail credentials (boo#1118935)

Non security issues fixed:

  * pEp - PGP/MIME signed-only messages are ignored
  * Autocrypt overrules manually created Per-Recipient Rules
  * "Re:" prefix on subject line disappears when editing encrypted, saved draft