install roundcube from our own mirror, hosted in Josh's AWS S3 account,...

install roundcube from our own mirror, hosted in Josh's AWS S3 account, because sourceforge is down all the time

fixes #750, see #701, see #370

CHANGELOG.md

@@ -17,6 +17,7 @@ Setup:
 
 * A swap file is now created if system memory is less than 2GB, 5GB of free disk space is available, and if no swap file yet exists.
 * Setup dialogs did not appear correctly when connecting to SSH using Putty on Windows.
+* We now install Roundcube from our own mirror because Sourceforge's downloads experience frequent intermittant unavailability.
 
 v0.17b (March 1, 2016)
 ----------------------

setup/webmail.sh

@@ -51,7 +51,7 @@ fi
 if [ $needs_update == 1 ]; then
 	# install roundcube
 	wget_verify \
-		https://downloads.sourceforge.net/project/roundcubemail/roundcubemail/$VERSION/roundcubemail-$VERSION.tar.gz \
+		https://s3.amazonaws.com/joshdata/mail-in-a-box/public/roundcubemail-$VERSION.tar.gz \
 		$HASH \
 		/tmp/roundcube.tgz
 	tar -C /usr/local/lib --no-same-owner -zxf /tmp/roundcube.tgz