add Dlog()
	fix empty phonc in case of LOOKUP
	modified:   btree/btree.c
	modified:   cgi/Makefile
	modified:   cgi/client/pbkc.c
	modified:   cgi/helpers/pbc_helpers.c
	modified:   include/debug.h
	modified:   include/pbc_helpers.h
	modified:   socket/skts.c
	modified:   srv/pbkd.c