Merged the pcas-vararray-3.14 branch, with fixes and notes

documentation/RELEASE_NOTES.html

@@ -18,9 +18,14 @@
 <p>Dynamic array sizing support was added to the IOC server (RSRV) in the
 Base-3.14.12 release, but has not until now been supported in the <q>Portable
 Channel Access Server</q> (PCAS). Channel Access server applications using the
-PCAS will have to be modified slightly to provide full support for variable
-length arrays, but unmodified applications will continue to build and work as
-before against this release.</p>
+PCAS may not need to be modified at all; if they already push monitors with
+different gdd array lengths, those variable sizes will be forwarded to any CA
+clients who have requested variable length updates. The example CAS server
+application has been modified to demonstrate this feature.</p>
+
+<p>In implementing the above, the gdd method <tt>gdd::put(const gdd *)</tt> now
+copies the full-sized array from the source gdd if the destination gdd is of
+type array, has no allocated memory and a boundary size of 0.</p>
 
 <h3>Additional epicsTime conversion</h3>