GUI: settings: fix embed_vector_font default 1 -> 0

manual: expand size/alpha details in Section "5.4 Buffering Symbols
  in Memory (raster)" (cf ticket #291);
  add BSD info (TODO: NetBSD);
  variable -> member (struct zint_symbol)
frontend: fix missing static on `validate_structapp()`
test suite: update to latest BWIPP (PDF417 needed adjusting)
Changelog: trim some more uninteresting changes

backend/tests/test_large.c

@@ -43,7 +43,7 @@
 #  elif defined(__GNUC__)
 #    pragma GCC diagnostic ignored "-Wformat" /* Unfortunately doesn't seem to be way to only avoid non-ISO warnings */
 #  endif
-#elif defined(_MSC_VER) || defined(__APPLE__) || __WORDSIZE == 32
+#elif defined(_MSC_VER) || defined(__APPLE__) || defined(__OpenBSD__) || __WORDSIZE == 32
 #  define LX_FMT "ll"
 #else
 #  define LX_FMT "l"

backend/tests/testcommon.c

@@ -2778,7 +2778,8 @@ int testUtilBwipp(int index, const struct zint_symbol *symbol, int option_1, int
                 }
             } else if (symbology == BARCODE_PDF417 || symbology == BARCODE_PDF417COMP || symbology == BARCODE_HIBC_PDF
                         || symbology == BARCODE_MICROPDF417 || symbology == BARCODE_HIBC_MICPDF) {
-                for (r = 0; r < symbol->rows; r++) bwipp_row_height[r] = 1; /* Change from 3 */
+                const int row_height = symbology == BARCODE_MICROPDF417 || symbology == BARCODE_HIBC_MICPDF ? 2 : 3;
+                for (r = 0; r < symbol->rows; r++) bwipp_row_height[r] = row_height;
                 if (option_1 >= 0) {
                     sprintf(bwipp_opts_buf + strlen(bwipp_opts_buf), "%seclevel=%d",
                             strlen(bwipp_opts_buf) ? " " : "", option_1);