Quickplot doesn't work on Linux with Apache+php

[hubu]

1. Open one BWL in Browser.
2. Quick plot -> Generate

Results: Nothing happened.

Note: There are 2 errors:

1. In Linux, the file name is case sensitive. We are using the "QuickPlotPreviewInner.templ" to open the "quickplotpreviewinner.templ" file, so the quickplot dialog is not displayed.

2. In php, we need to generate png file with GD library. However, on Linux the PHP should build with the GD library, or else the php can't support GD.

3. On Linux, we can't get the png file with fcgi when the map name has blank.

[jbirch]

Appears to have been fixed in [5449] and [5450]