#2200.

(please say if don't agree)

mention the link to use more music track players in the tooltip of set_status_msg_from_current_music_track_checkbutton

if user is xfce4 user [startxfce4 or xfce4-session in running procs] then use exo-open (needs libexo) to open urls using the xfce defined default apps

cleaning Makefile.in-s in make maintainer-clean
skip noisy message in autogen.sh

fix install location for servers.xml