Fix the systemd unit file for OpenJDK

contrib/airsonic.service

@@ -24,7 +24,6 @@ Group=airsonic
 # See https://www.freedesktop.org/software/systemd/man/systemd.exec.html
 # for details
 DevicePolicy=closed
-MemoryDenyWriteExecute=yes
 NoNewPrivileges=yes
 PrivateDevices=yes
 PrivateTmp=yes
@@ -45,6 +44,11 @@ ProtectSystem=full
 #ProtectSystem=strict
 #ReadWritePaths=/var/airsonic
 
+# You can uncomment the following line if you're not using the OpenJDK.
+# This will prevent processes from having a memory zone that is both writeable
+# and executeable, making hacker's lifes a bit harder.
+#MemoryDenyWriteExecute=yes
+
 
 [Install]
 WantedBy=multi-user.target