WMSGetCapabilities: scalehint values seem incorrect

[bartvde]

This is what Mapserver reports in the WMS GetCapabilities:

<ScaleHint min="39.5998292216226" max="835.651436166369" />

In the MAP file this corresponds to:

MINSCALE 100000
MAXSCALE 2.11024e+06

Format.WMSCapabilities gives:

4220480
200000

So this is doubled somehow!

[bartvde]

The problem here is that the value is multiplied with rad2, and it should be divided.

[bartvde]

Added patch, still needs a testcase though, but this can be easily added after #2145 has been committed to trunk.

[elemoine]

ticket250.1.patch adds tests. Thanks Bart for providing me with the numbers to test against. Please commit if the patch works for you.

[bartvde]

(In [9571]) correctly parse ScaleHint values from WMS GetCapabilities response, thanks elemoine for the testcase, r=elemoine (closes #2150)