➖ drop wheezy support

Removes the Vagrant set up for Debian wheezy and makes the installer abort and complain if started
on wheezy.

Vagrantfile

@@ -60,12 +60,6 @@ Vagrant.configure("2") do |config|
     os.vm.box = "bento/debian-9.2"
     provision_libretime(os, "debian.sh", installer_args)
   end
-  config.vm.define "debian-wheezy" do |os|
-    STDERR.puts 'WARNING: The "debian-wheezy" option is deprecated. Please migrate to "debian-stretch".'
-    STDERR.puts
-    os.vm.box = "bento/debian-7.11"
-    provision_libretime(os, "debian.sh", installer_args)
-  end
   config.vm.define "centos" do |os|
     os.vm.box = 'centos/7'
     provision_libretime(os, "centos.sh", installer_args + "--selinux")

docs/manual/preparing-the-server/index.md

@@ -234,12 +234,7 @@ and then run the command (as root):
 
 This should make sure that **rabbitmq-server** starts after the next reboot.
 
-libav on Debian squeeze and .m4a files
---------------------------------------
-
-The version of libav shipped with Debian 6.0 'squeeze' is known to cause problems when Airtime analyses .m4a files containing the AAC codec for silence, using Silan (see <https://github.com/x42/silan/issues/2>). It is recommended that Debian servers are upgraded to the current stable 'wheezy' 7.2 release. As a short-term measure, updated libav packages from the squeeze-backports repository can be used to work around this problem. This work-around is only required if you do not wish to upgrade to 'wheezy' yet, but have AAC codec .m4a files in your Airtime library.
-
 Mail server
 -----------
 
-If you wish Airtime to be able to send password reminder emails to your staff users, the server can have an SMTP program installed, such as the **postfix** package in Debian or Ubuntu. For configuration options, refer to the documentation for your mail server of choice. Alternatively, you can specify an external SMTP server in the **Preferences** page on Airtime's **System** menu.
+If you wish Airtime to be able to send password reminder emails to your staff users, the server can have an SMTP program installed, such as the **postfix** package in Debian or Ubuntu. For configuration options, refer to the documentation for your mail server of choice. Alternatively, you can specify an external SMTP server in the **Preferences** page on Airtime's **System** menu.

docs/vagrant.md

@@ -35,7 +35,6 @@ With the above instructions LibreTime is installed on Ubuntu Xenial Xerus. The V
 | ------ | ------------------- | ------- |
 | Debian 9.2   | `vagrant up debian-stretch` | Install on current Debian Stretch. |
 | Debian 8.7   | `vagrant up debian-jessie`  | Install on Debian Jessie. |
-| Debian 7.11  | `vagrant up debian-wheezy`  | Deprecated install on Debian Wheezy. Please switch to debian-stretch. |
 | Ubuntu 18.04 | `vagrant up ubuntu-bionic`  | Experimental install on current Ubuntu Bionic Beaver. |
 | Ubuntu 16.04 | `vagrant up ubuntu-xenial`  | Install on Ubuntu Xenial Xerus. |
 | Ubuntu 14.04 | `vagrant up ubuntu-trusty`  | Deprecated install on Ubuntu Trusty Tahir. Recommended by legacy upstream. |

install

@@ -586,7 +586,6 @@ fi
 is_debian_dist=false
 is_debian_stretch=false
 is_debian_jessie=false
-is_debian_wheezy=false
 is_ubuntu_dist=false
 is_ubuntu_bionic=false
 is_ubuntu_xenial=false
@@ -636,9 +635,9 @@ case "${dist}-${code}" in
         is_debian_jessie=true
         ;;
     debian-7|debian-wheezy)
-        code="wheezy"
+        echo -e "ERROR: Debian Wheezy is archived and does not receive any security or other updates since 2018-05-31." >&2
-        is_debian_dist=true
+        echo -e "The LibreTime installer dropped support for installing LibreTime on Wheezy in 3.0.0-alpha.6." >&2
-        is_debian_wheezy=true
+        exit 1
         ;;
     centos-7)
         is_centos_dist=true