#36 libsocket not include cause build fail on Solaris

[Halton Huo]

/ws/onnv-tools-prc/SUNWspro/SS12/bin/cc -g -o tsclient main.o support.o connect.o rdpfile.o mrulist.o -R/usr/X11/lib -L/usr/X11/lib -lpanel-applet-2 -lgnomeui-2 -lSM -lICE -lbonoboui-2 -lgnomevfs-2 -lgconf-2 -lgnomecanvas-2 -lgnome-2 -lpopt -lart_lgpl_2 -lgailutil -lgtk-x11-2.0 -lgdk-x11-2.0 -lXi -lXext -lX11 -latk-1.0 -lgdk_pixbuf-2.0 -lm -lmlib -lpangocairo-1.0 -lfontconfig -lXrandr -lXcursor -lXcomposite -lXdamage -lpango-1.0 -lcairo -lXfixes -lbonobo-2 -lbonobo-activation -lgmodule-2.0 -lORBit-2 -lgthread-2.0 -lpthread -lthread -lgobject-2.0 -lglib-2.0
Undefined first referenced
symbol in file
socket support.o (symbol belongs to implicit dependency /lib/libsocket.so.1)
connect support.o (symbol belongs to implicit dependency /lib/libsocket.so.1)

Apparently libsocket is not needed on Linux because the
corresponding functions are already included in the standard C library. Should be handled in the configure script.

[Halton Huo]