SLD TextSymbolizer missing support for HALO and ANGLE

[dmorissette]

It has been reported that the SLD TextSymbolizer is missing support for HALO (OUTLINE) and ANGLE.

The TextSymbolizer's Fill and Radius could be converted to OUTLINECOLOR and OUTLINEWIDTH (note that outlinewidth is available only for AGG output in 5.2)

With respect to the label angle, if the symbolizer uses LinePlacement then we could set the ANGLE to either FOLLOW or AUTO. Follow is preferable as the default since that looks much better and is more likely what users want to see on maps these days.

[assefa]

committed in trunk r8018.

Waiting for additional tests for back porting it to 5.2.x

[assefa]

committed in the 5.2.x branch: r8020.

SLD docs updated.

Closing.