gfal2-dmc-1311 update
created GFAL_EVENT_IPV6 event and fixed event reporting modified GridFTP plugin to also use GFAL_EVENT_IPV6 instead of GFAL_GRIDFTP_IPV6_QUARK
created GFAL_EVENT_IPV6 event and fixed event reporting modified GridFTP plugin to also use GFAL_EVENT_IPV6 instead of GFAL_GRIDFTP_IPV6_QUARK