add support to GLOBUS_GFS_CMD_SITE_RDEL

add MD5 checksum (need -lssl when linking the .so)

add GRIDFTP_APPEND_XROOTD_CGI hook (environment variable) to support Xrootd space token.

in globus_l_gfs_posix_command(), include errno in the return.

remove code releated to checking quota against xrootd CNS server.

I believe it has never been used.

Separating globus_gridftp_server_posix.c from xrootd releases.

initial globus_gridftp_server_posix.c: identical to that in xrootd
release 3.0.2
initial Makefile: from VDT team