Make label expressions consistent with class expressions by allowing them to work off an item (labelitem).
use st_force2d instead of deprecated st_force_2d (#4803)
use version specific postgis force2d function (#4803)

also adds a PROCESSING "FORCE2D=no" to avoid using force2d altogether (#4024)
Update mapfile.c

There has a bug in line 668 and 670. we should replace fprintf with msIO_fprintf. if not, the result will print to stdout in python mapscript.
update my contact info
Merge pull request #4810 from takinwang/patch-1

Update mapfile.c
fix segfault on legends with keyimage (#4808)
Merge branch 'branch-6-4'

Conflicts:
	maputil.c
	msautotest
Allows floating point NoData/NULLVALUEs for floating point images.
Fix issue on Travis due to a PPA with PostGIS 2.1 conflicting with ubuntugis, so disable this PPA
Merge branch 'fix_travis_issue'
Allows floating point NoData/NULLVALUEs for floating point images.
Merge PR #4803
fix travis build
Merge branch 'branch-6-4'