Initial systemd support

CMakeLists.txt

 endif()
 
 if(NOT DEFINED INIT_FLAVOR)
-    if(IS_DIRECTORY "${SYSCONF_DIR}/init" AND EXISTS "/lib/init/upstart-job")
+	if(IS_DIRECTORY "${SYSCONF_DIR}/systemd" AND EXISTS "/usr/lib/systemd/systemd")
+        message(STATUS "Detected init flavor: systemd")
+        set(INIT_FLAVOR "systemd" CACHE STRING "Init daemon of this system")
+    elseif(IS_DIRECTORY "${SYSCONF_DIR}/init" AND EXISTS "/lib/init/upstart-job")
         message(STATUS "Detected init flavor: upstart")
         set(INIT_FLAVOR "upstart" CACHE STRING "Init daemon of this system")
     elseif(IS_DIRECTORY "${SYSCONF_DIR}/init.d" AND EXISTS "${SYSCONF_DIR}/init.d/functions")
 configure_file(${PROJECT_NAME}.rh_init.in ${PROJECT_NAME}.rh_init @ONLY)
 configure_file(${PROJECT_NAME}.upstart.in ${PROJECT_NAME}.upstart @ONLY)
 configure_file(${PROJECT_NAME}.apparmor.in ${PROJECT_NAME}.apparmor @ONLY)
+configure_file(${PROJECT_NAME}.service.in ${PROJECT_NAME}.service @ONLY)
 configure_file(postinstall.cmake.in postinstall.cmake @ONLY)
 
 if(HELP2MAN)

postinstall.cmake.in

 	endif()
 elseif(INIT_FLAVOR STREQUAL "upstart")
 	file(INSTALL FILES "@CMAKE_CURRENT_BINARY_DIR@/@PROJECT_NAME@.upstart" DESTINATION "${SYSCONF_DIR}/init" RENAME "@PROJECT_NAME@.conf")
+elseif(INIT_FLAVOR STREQUAL "systemd")
+	file(INSTALL FILES "@CMAKE_CURRENT_BINARY_DIR@/@PROJECT_NAME@.service" DESTINATION "${SYSCONF_DIR}/systemd/system" RENAME "@PROJECT_NAME@.service")
 endif()
 
 if(GENERATE_SRS_SECRET AND DD AND BASE64 AND EXISTS "/dev/urandom" AND NOT EXISTS "$ENV{DESTDIR}${SYSCONF_DIR}/${SECRET_FILE}")

postsrsd.service.in

+Description=PostSRSd Daemon
+After=network.target
+
+[Service]
+Type=simple
+Environment=SRS_DOMAIN=localhost.localdomain SRS_FORWARD_PORT=10001 SRS_REVERSE_PORT=10002 SRS_SECRET=@SYSCONF_DIR@/@PROJECT_NAME@.secret
+Environment=SRS_EXCLUDE_DOMAINS= RUN_AS=nobody CHROOT=@CHROOT_DIR@
+EnvironmentFile=-@CONFIG_DIR@/@PROJECT_NAME@
+ExecStart=@CMAKE_INSTALL_PREFIX@/sbin/@POSTSRSD@ -4 -f${SRS_FORWARD_PORT} -r${SRS_REVERSE_PORT} -d${SRS_DOMAIN} -s${SRS_SECRET} -u${RUN_AS} -c${CHROOT} -X${SRS_EXCLUDE_DOMAINS}
+Restart=always
+
+[Install]
+WantedBy=multi-user.target