shpxy fails when projection provided

[pspencer@…]

This was discovered using the php/mapscript interface but I think it is really
an issue in the core.  When using the shpxy tag in a layer template and invoking
it using processQueryTemplate, the processor fails (and crashes php) when a
proj="<projection>".

This does not happen with proj="image" or no proj.  It only happens with
proj="<some valid projection string>"

PHP/MapScript test case to be attached.

Assefa has investigated and it appears that the tag processor fails because
valid projections contain = so the tag looks like:

[shpxy proj="init=epsg:4326"]

or

[shpxy proj="+proj=latlong +ellps=wgs84"]

The = embedded in the proj strings cause the problem.

This affects every version that has the shpxy tag available (4.2 and 4.3 I think)

[pspencer@…]

shpxy test script

[sdlime]

Then we should be able to skip embedded = signs in the tag parser in much the
same way that spaces are skipped. I'll take a look.

Steve

[sdlime]

Julien fixed the template tag parser to allow equal signs within quoted tags. 
This change made it into 4.4 and as far as I know works fine. Marking as fixed 
for now...

Steve