revise develop.tex, tease local_xy for disv

doc/ReleaseNotes/develop.tex

@@ -46,7 +46,8 @@
 		\item The Stress Package Concentration (SPC) utility available with the SSM Package is now the referred to as the Stress Package Component utility in the MF6IO guide.  Additionally, some relatively minor refactoring of the code facilitates use of the SPC utility with the GWE model type so that TEMPERATURE arrays may be read by the utility.  The SPC acronym was maintained to preserve backward compatibility.
 		\item The GWF-GWF Exchange has been fixed to support the configuration of the Mover package (MVR) also in cases where the number of exchanges equals zero (NEXG = 0). In earlier versions this has caused MODFLOW to terminate with an error.
 		\item A PRT bug was fixed in which array-based input read from the RCH (recharge) or EVT (evapotranspiration) packages could fail to be processed correctly by the PRT FMI (flow model interface) package, causing a crash.
-		\item Previously the PRT model's PRP package required release points to be specified in the model coordinate system (except for the z coordinate via the LOCAL\_Z option). PRT also previously reported pathlines in the model coordinate system. The PRT model now supports coordinate transformations for release point input and pathline output via keyword options for the PRP package, while preserving the existing default model coordinate system. Release point x and y coordinates may now be specified for structured grids with reference to the local rectilinear cell (with coordinates scaled to the unit interval) via the LOCAL\_XY keyword option. The LOCAL\_XY\_OFFSET option, supported for structured or unstructured grids, can be used to locate release point x and y coordinates at an offset from the cell center (with no distance rescaling).
+		\item Previously the PRT model's PRP package required release points to be specified in the model coordinate system (except for the z coordinate via the LOCAL\_Z option). The PRT model now supports coordinate transformations for release point input via keyword options for the PRP package. Release point x and y coordinates may now be specified for structured grids with reference to the local rectilinear cell, with coordinates scaled to the unit interval, via the LOCAL\_XY keyword option. (A future version will likely add support for LOCAL\_XY on unstructured grids, where "local" is reinterpreted in the context of the generalized tracking method). Release point x and y coordinates may also now be specified at an offset from the cell center (with no distance rescaling) via the LOCAL\_XY\_OFFSET option, supported for structured or unstructured grids.
+	%	\item xxx
 	\end{itemize}
 
 	%\underline{INTERNAL FLOW PACKAGES}