buildlist
(void) buildlist(&fromexcl, optarg + 1);
(void) buildlist(&fromlist, optarg);
(void) buildlist(&toexcl, optarg + 1);
(void) buildlist(&tolist, optarg);
(void) buildlist(&ifexcl, optarg + 1);
(void) buildlist(&iflist, optarg);
(void) buildlist(&vifexcl, optarg + 1);
(void) buildlist(&viflist, optarg);
static char *buildlist(char **, char const *);