Merge tag 'v0.42b' of https://github.com/mail-in-a-box/mailinabox

v0.42b (August 3, 2019)
-----------------------

Changes:

* Decreased the minimum supported RAM to 502 Mb.
* Improved mail client autoconfiguration.
* Added support for S3-compatible backup services besides Amazon S3.
* Fixed the control panel login page to let LastPass save passwords.
* Fixed an error in the user privileges API.
* Silenced some spurrious messages.

Software updates:

* Upgraded Roundcube from 1.3.8 to 1.3.9.
* Upgraded Nextcloud from 14.0.6 to 15.0.8 (with Contacts from 2.1.8 to
3.1.1 and Calendar from 1.6.4 to 1.6.5).
* Upgraded Z-Push from 2.4.4 to 2.5.0.

Note that v0.42 (July 4, 2019) was pulled shortly after it was released
to fix a Nextcloud upgrade issue.

5F4C0E7313CCD744693B2AEAB92041F4C10BDD81

README.md

@@ -198,7 +198,7 @@ by him:
 	$ curl -s https://keybase.io/joshdata/key.asc | gpg --import
 	gpg: key C10BDD81: public key "Joshua Tauberer <jt@occams.info>" imported
 
-	$ git verify-tag v0.41
+	$ git verify-tag v0.42b
 	gpg: Signature made ..... using RSA key ID C10BDD81
 	gpg: Good signature from "Joshua Tauberer <jt@occams.info>"
 	gpg: WARNING: This key is not certified with a trusted signature!
@@ -211,7 +211,7 @@ and on his [personal homepage](https://razor.occams.info/). (Of course, if this
 
 Checkout the tag corresponding to the most recent release:
 
-	$ git checkout v0.41
+	$ git checkout v0.42b
 
 Begin the installation.