zint.h: increase symbol->text size 160 -> 200;

rename `ZINT_CAP_EXTENDABLE` -> `ZINT_CAP_EANUPC`
  (`ZINT_CAP_EXTENDABLE` marked as legacy)
CODE128: increase no. symbol chars max 60 -> 99
EAN-2/EAN-5: fix `BARCODE_BIND_TOP/BIND/BOX` output
GS1_128: warn if data > 48 (GS1 General Specifications max)
common: `is_extendable()` -> `is_ucpean()`
raster: add `ZFONT_HALIGN_CENTRE/LEFT/RIGHT` flags and process
  in `draw_string()` (for drawing EAN/UPC outside digits), and
  for `ZFONT_HALIGN_CENTRE` round when calculating centre
  (shifts some texts 1 pixel left)
raster/vector: use offsets into `symbol->text` for EAN/UPC
  instead of `out_upcean_split_text()` (removed)
BMP/EMF/GIF/PCX/PNG/PS/SVG/TIF: use new `out_colour_get_rgb()`
  routine (replaces `colour_to_XXX()`)
general: simplify/fix some `error_number` handling/returning
frontend: truncate overlong `--primary` instead of ignoring;
  negative floating pt option (for `--textgap`)
man page: list size detail for matrix symbols (`--vers`)
manual: further fiddling with scaling text; some typos

backend/tests/data/svg/dpd_compliant.svg

@@ -1,11 +1,11 @@
 <?xml version="1.0" standalone="no"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg width="472" height="162" version="1.1" xmlns="http://www.w3.org/2000/svg">
+<svg width="472" height="156" version="1.1" xmlns="http://www.w3.org/2000/svg">
  <desc>Zint Generated Symbol</desc>
  <g id="barcode" fill="#000000">
-  <rect x="0" y="0" width="472" height="162" fill="#FFFFFF"/>
+  <rect x="0" y="0" width="472" height="156" fill="#FFFFFF"/>
   <path d="M25 6h4v133.33h-4ZM31 6h2v133.33h-2ZM37 6h2v133.33h-2ZM47 6h2v133.33h-2ZM55 6h2v133.33h-2ZM61 6h4v133.33h-4ZM69 6h2v133.33h-2ZM75 6h6v133.33h-6ZM83 6h4v133.33h-4ZM91 6h2v133.33h-2ZM95 6h6v133.33h-6ZM103 6h8v133.33h-8ZM113 6h2v133.33h-2ZM121 6h4v133.33h-4ZM129 6h2v133.33h-2ZM135 6h4v133.33h-4ZM143 6h6v133.33h-6ZM153 6h2v133.33h-2ZM157 6h6v133.33h-6ZM165 6h4v133.33h-4ZM173 6h2v133.33h-2ZM179 6h4v133.33h-4ZM187 6h2v133.33h-2ZM193 6h2v133.33h-2ZM201 6h8v133.33h-8ZM211 6h2v133.33h-2ZM219 6h2v133.33h-2ZM223 6h4v133.33h-4ZM229 6h4v133.33h-4ZM237 6h4v133.33h-4ZM245 6h4v133.33h-4ZM251 6h4v133.33h-4ZM259 6h4v133.33h-4ZM267 6h4v133.33h-4ZM275 6h4v133.33h-4ZM283 6h4v133.33h-4ZM289 6h4v133.33h-4ZM295 6h4v133.33h-4ZM303 6h4v133.33h-4ZM311 6h6v133.33h-6ZM321 6h4v133.33h-4ZM327 6h2v133.33h-2ZM333 6h4v133.33h-4ZM341 6h2v133.33h-2ZM349 6h2v133.33h-2ZM355 6h2v133.33h-2ZM359 6h4v133.33h-4ZM367 6h6v133.33h-6ZM377 6h4v133.33h-4ZM385 6h2v133.33h-2ZM389 6h2v133.33h-2ZM399 6h2v133.33h-2ZM403 6h2v133.33h-2ZM407 6h8v133.33h-8ZM421 6h4v133.33h-4ZM431 6h6v133.33h-6ZM439 6h2v133.33h-2ZM443 6h4v133.33h-4ZM25 0h422v6h-422Z"/>
-  <text x="236" y="152.68" text-anchor="middle" font-family="Arimo, Arial, sans-serif" font-size="14">
+  <text x="235" y="152.68" text-anchor="middle" font-family="Arimo, Arial, sans-serif" font-size="14">
    0081 827 0998 0000 0200 28 101 276 B
   </text>
  </g>

backend/tests/data/svg/ean2_box1.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg width="54" height="122" version="1.1" xmlns="http://www.w3.org/2000/svg">
+ <desc>Zint Generated Symbol</desc>
+ <g id="barcode" fill="#000000">
+  <rect x="0" y="0" width="54" height="122" fill="#FFFFFF"/>
+  <path d="M2 20h2v100h-2ZM6 20h4v100h-4ZM14 20h4v100h-4ZM22 20h2v100h-2ZM26 20h2v100h-2ZM32 20h2v100h-2ZM38 20h4v100h-4ZM0 18h54v2h-54ZM0 120h54v2h-54ZM0 20h2v100h-2ZM52 20h2v100h-2Z"/>
+  <text x="22" y="15.6" text-anchor="middle" font-family="OCRB, monospace" font-size="20">
+   12
+  </text>
+ </g>
+</svg>

backend/tests/data/svg/ean5_bind2.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg width="104" height="126" version="1.1" xmlns="http://www.w3.org/2000/svg">
+ <desc>Zint Generated Symbol</desc>
+ <g id="barcode" fill="#000000">
+  <rect x="0" y="0" width="104" height="126" fill="#FFFFFF"/>
+  <path d="M0 22h2v100h-2ZM4 22h4v100h-4ZM10 22h4v100h-4ZM18 22h4v100h-4ZM24 22h2v100h-2ZM30 22h2v100h-2ZM36 22h4v100h-4ZM42 22h2v100h-2ZM46 22h2v100h-2ZM56 22h2v100h-2ZM60 22h2v100h-2ZM64 22h2v100h-2ZM72 22h4v100h-4ZM78 22h2v100h-2ZM82 22h4v100h-4ZM92 22h2v100h-2ZM0 18h104v4h-104ZM0 122h104v4h-104Z"/>
+  <text x="47" y="15.6" text-anchor="middle" font-family="OCRB, monospace" font-size="20">
+   12345
+  </text>
+ </g>
+</svg>