Move player pausing to saturnin-iam hook

Needs saturnin 0.21+

dotfiles/saturnin/hook.ini

@@ -13,3 +13,6 @@
     say_gone     = pidof hexchat && hexchat -e -c 'nick amahdal|gone'
     say_back     = pidof hexchat && hexchat -e -c 'nick amahdal'
     say_zleeping = pidof hexchat && hexchat -e -c 'nick amahdal|zleeping'
+
+    afk          = pidof mocp       && mocp --pause
+    afk          = pidof clementine && clementine --pause