#2992: revise DO regular expression to work under windows as well.  This is a revision of r13123 commit.

git-svn-id: http://svn.osgeo.org/postgis/trunk@13128 b70326c6-7e19-0410-871a-916f4a2858ee
get rid of redundant DO regress

git-svn-id: http://svn.osgeo.org/postgis/trunk@13129 b70326c6-7e19-0410-871a-916f4a2858ee