support of command line compiles. Adds new configure command line option
--with-winsock to enable winsock if necessary where alternative socket libraries
exist.
Modified BOINC_CHECK_CYGWIN to call AX_WINSOCK.
Modified boinc_getsockopt.m4 to get correct type when winsock is used.
Modified AX_CHECK_GLUT to find correct libraries when compiling under
windows from command line.
svn path=/trunk/boinc/; revision=9072
Eric J. Korpela