Mobile skin and plugin for Roundcube webmail

The "Melanie2" mobile skin and plugin seems to make Roundcube work on phones. And it is easier to install than it would seem when only briefly looking at the github instructions.

These are the commands I needed on a Debian 10 ("Buster") machine where roundcube 1.3.10 was installed. (the base install was done from the Debian repositories: apt install roundcube roundcube-sqlite3. Instead of sqlite3, it is also possible to use PostgreSQL or MySQL with the roundcube-pgsql or roundcube-mysql packages).

For the mobile stuff:

Create a directory to store the extra stuff and make upgrades easier:

mkdir -p /opt/roundcube-stuff
cd /opt/roundcube-stuff/

Get the files from Github:

git clone https://github.com/messagerie-melanie2/roundcube_skin_melanie2_larry_mobile
git clone https://github.com/messagerie-melanie2/roundcube_jquery_mobile
git clone https://github.com/messagerie-melanie2/roundcube_mobile

Instead of renaming and copying the directories, create symlinks and copy them to roundcube's skins and plugins folders:

ln -si $(pwd)/roundcube_skin_melanie2_larry_mobile/ melanie2_larry_mobile
ln -si $(pwd)/roundcube_jquery_mobile/              jquery_mobile
ln -si $(pwd)/roundcube_mobile                      mobile

cp -vd /opt/roundcube-stuff/melanie2_larry_mobile   /var/lib/roundcube/skins/
cp -vd /opt/roundcube-stuff/jquery_mobile           /var/lib/roundcube/plugins/
cp -vd /opt/roundcube-stuff/mobile                  /var/lib/roundcube/plugins/

Finally, add 'mobile' to the $config['plugins'] array in /etc/roundcube/config.inc.php. If doing it by hand is too much work, copy/pasting this should work:

echo 'array_push( $config["plugins"], "mobile" );' | tee -a /etc/roundcube/config.inc.php
#or:
## echo '$config["plugins"][] = "mobile";' | tee -a /etc/roundcube/config.inc.php