Document the impact of LAYER.TOLERANCE for WFS GetFeature.
Merge pull request #48 from faegi/wfsQueryTolerance

Document the impact of LAYER.TOLERANCE for WFS GetFeature.
add RFC101: Content Dependant Legend Rendering
add to rfc101 as per email discussion
Updated documentation of offset (-99) for style as suggested in mapserver/mapserver#4716
Merge branch 'branch-6-2'
add docs for -999 offset (line outline)

mapserver/mapserver#4716