SVG/ru

Read the following for SVG support:
 * Manual:Image Administration - How to enable MediaWiki's support of SVG.
 * $wgFileExtensions - How to add 'svg' to permitted extensions
 * $wgSVGConverters - How to specify the image converters commands
 * $wgSVGConverterPath - How to set up the SVG converter if it is not on $PATH
 * SVG benchmarks - Comparisons between librsvg, Batik, InkScape and ImageMagick