Code review comments from jeffpc

*** 221,241 ****
          }
  
          for (fd = flagdescs; fd->name != NULL; fd++) {
                  if (secflag_isset(flags, fd->value)) {
                          if (buf[0] != '\0')
!                                 (void) strlcat(buf, ", ", buflen);
                          (void) strlcat(buf, fd->name, buflen);
                  }
  
                  secflag_clear(&flags, fd->value);
          }
  
          if (flags != 0) {       /* unknown flags */
!                 char hexbuf[11]; /* 0x%08x */
  
!                 (void) snprintf(hexbuf, sizeof (hexbuf), "0x%08x", flags);
                  if (buf[0] != '\0')
!                         (void) strlcat(buf, ", ", buflen);
                  (void) strlcat(buf, hexbuf, buflen);
          }
  }
--- 221,241 ----
          }
  
          for (fd = flagdescs; fd->name != NULL; fd++) {
                  if (secflag_isset(flags, fd->value)) {
                          if (buf[0] != '\0')
!                                 (void) strlcat(buf, ",", buflen);
                          (void) strlcat(buf, fd->name, buflen);
                  }
  
                  secflag_clear(&flags, fd->value);
          }
  
          if (flags != 0) {       /* unknown flags */
!                 char hexbuf[19]; /* 0x%16 PRIx64 */
  
!                 (void) snprintf(hexbuf, sizeof (hexbuf), "0x%16" PRIx64, flags);
                  if (buf[0] != '\0')
!                         (void) strlcat(buf, ",", buflen);
                  (void) strlcat(buf, hexbuf, buflen);
          }
  }