added --enable-all-static and --with-all-static-libs to ease full static binary builds for selected commands

fixed a bug where the client socket is kept when keep-alive is set. it should have been closed if client EOF is detected regardless of keep-alive
touched up debug messages in http-file.c

lib/http-prv.h

@@ -40,6 +40,8 @@ struct hio_svc_htts_cli_t
 	/* a client sockets uses all the fields in this struct */
 	hio_svc_htts_t* htts;
 	hio_dev_sck_t* sck;
+	hio_skad_t cli_addr;
+	hio_bch_t cli_addr_bcstr[HIO_SKAD_IP_STRLEN + 1];
 	hio_oow_t l_idx; /* listening socket: < htts->l.count, client socket: >= htts->l.count */
 
 	hio_htrd_t* htrd;