add systemd service templates for debian

Those new templates will be installed by dh_installinit.

based on the work of @zh99998 for AUR.

debian/README.Debian

@@ -1,15 +1,16 @@
 shadowsocks-libev for Debian
 ----------------------
 
-The Debian package has added systemd support. By default, the dpkg installer
-will enable initscripts if the OS is using sysvinit, and systemd service unit
-file if the OS is using systemd. This is done automatically.
+The Debian package has added systemd support. A default server service which
+reads the default configuration in /etc/default/shadowsocks-libev is installed
+and enabled by default, plus some other service templates placed in
+/lib/systemd/system, which can be used by users later.
 
 Another problem is that shadowsocks-libev is licensed under GPLv3+. This will
 conflict with OpenSSL License when linked against OpenSSL library. As a
 result, this package faces licensing problem. Use it at your own risk.
 
- -- Boyuan Yang <073plan@gmail.com>  Fri, 11 Sep 2015 19:08:30 +0800
+ -- Boyuan Yang <073plan@gmail.com>  Wed, 14 Oct 2015 09:18:50 +0800
 
 (No special notes.)
 

debian/rules

@@ -27,5 +27,12 @@ override_dh_auto_configure:
 	dh_auto_configure -- \
         --enable-shared
 
+override_dh_installinit:
+	dh_installinit
+	dh_installinit --no-start --name=shadowsocks-libev-server@
+	dh_installinit --no-start --name=shadowsocks-libev-tunnel@
+	dh_installinit --no-start --name=shadowsocks-libev-redir@
+	dh_installinit --no-start --name=shadowsocks-libev-local@
+
 %:
 	dh $@  --with systemd

debian/shadowsocks-libev-local@.service

@@ -0,0 +1,23 @@
+#  This file is part of shadowsocks-libev.
+#
+#  Shadowsocks-libev is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This is a template unit file. Users may copy and rename the file into
+#  config directories to make new service instances. See systemd.unit(5)
+#  for details.
+
+[Unit]
+Description=Shadowsocks-Libev Custom Client Service for %I
+After=network.target
+
+[Service]
+Type=simple
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+ExecStart=/usr/bin/ss-local -c /etc/shadowsocks-libev/%i.json
+
+[Install]
+WantedBy=multi-user.target
+

debian/shadowsocks-libev-redir@.service

@@ -0,0 +1,23 @@
+#  This file is part of shadowsocks-libev.
+#
+#  Shadowsocks-libev is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This is a template unit file. Users may copy and rename the file into
+#  config directories to make new service instances. See systemd.unit(5)
+#  for details.
+
+[Unit]
+Description=Shadowsocks-Libev Custom Client Service Redir Mode for %I
+After=network.target
+
+[Service]
+Type=simple
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+ExecStart=/usr/bin/ss-redir -c /etc/shadowsocks-libev/%i.json
+
+[Install]
+WantedBy=multi-user.target
+

debian/shadowsocks-libev-server@.service

@@ -0,0 +1,23 @@
+#  This file is part of shadowsocks-libev.
+#
+#  Shadowsocks-libev is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This is a template unit file. Users may copy and rename the file into
+#  config directories to make new service instances. See systemd.unit(5)
+#  for details.
+
+[Unit]
+Description=Shadowsocks-Libev Custom Server Service for %I
+After=network.target
+
+[Service]
+Type=simple
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+ExecStart=/usr/bin/ss-server -c /etc/shadowsocks-libev/%i.json
+
+[Install]
+WantedBy=multi-user.target
+

debian/shadowsocks-libev-tunnel@.service

@@ -0,0 +1,23 @@
+#  This file is part of shadowsocks-libev.
+#
+#  Shadowsocks-libev is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This is a template unit file. Users may copy and rename the file into
+#  config directories to make new service instances. See systemd.unit(5)
+#  for details.
+
+[Unit]
+Description=Shadowsocks-Libev Custom Client Service Tunnel Mode for %I
+After=network.target
+
+[Service]
+Type=simple
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+ExecStart=/usr/bin/ss-tunnel -c /etc/shadowsocks-libev/%i.json
+
+[Install]
+WantedBy=multi-user.target
+