Harmonize functions to parse epsg codes from WFS GetFeature requests and support different variants for expressing epsg codes.
Support for CRS URI format http://www.openis.net/gml/srs/epsg.xml#xxx as specified in WFS
Segfault resolved when parsing srsName in WFS spatial filter.
Fix a memory leak in `freeClass()` exposed by valgrind's memcheck

In `msGrowClassLabels()` memory is assigned to
`class->labels[class->numlabels]` but was only freed to
`class->numstyles-1` in `freeClass()`.  This fix ensures the last
label is freed.
Revert "Fix a memory leak in `freeClass()` exposed by ... memcheck"

This reverts commit 4b90c2404f4b3209f491ab84780f735fba4a119d which as
discussed in issue #4685 is not a valid solution.
Ensure class labels are free'd in cases where label loading fails
Install postgresql-9.1-postgis-2.0-scripts in Travis due to packaging change of postgis
updated msautotest to latest branch-6-2 revision
Fix msContourGetOption() to be able to parse values where no min/maxscaledenom is specified, e.g. PROCESSING 'CONTOUR_INTERVAL=20' (#4691)
solved symbol size trunc bug thanks to tbonfort
Merge pull request #4699 from luipir/branch-6-2

fix integer rounding on sld se:size (#4699)
printed color alpha value in map file
Add proxy and auth support to wfs client (#3982)

Copied & adapted from similar code in mapwmslayer.c.

Fix two copy-pasto errors while here, wfs_http_cookie was not
looked up.
Move the common code handling proxy/auth metadata statements in a single function
Add support for shapefiles with uppercase extension on Linux (#4712)
add cmake support for POSTGIS_HAS_SERVER_VERSION (#4675)
fix memory crashes in getfeaturinfo requests (#4684)
variable declaration
add support for SVG symbology in cmake build (#4634)

note that svg-cairo does not properly link against current versions
of cairo as it uses an obsolete API. Support for SVG symbols is
disabled by default because of this
run simple svg tests on CI build