Add the documentation for XML processing limits to module summary. The limits were previously documented in Java tutorial and guide.
------------- Commit messages: - 8261670: Add javadoc for the XML processing limits Changes: https://git.openjdk.java.net/jdk/pull/2732/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2732&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8261670 Stats: 87 lines in 1 file changed: 81 ins; 1 del; 5 mod Patch: https://git.openjdk.java.net/jdk/pull/2732.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/2732/head:pull/2732 PR: https://git.openjdk.java.net/jdk/pull/2732
