[14] RFR (doc) 8237651 Clarify initialization of jdk.serialFilter

[Roger Riggs]

Please review a doc change in the description of the initialization of 
the jdk.serialFilter from
a system property to generalize it beyond only command line invocation.

diff a/src/java.base/share/classes/java/io/ObjectInputFilter.java b/src/java.base/share/classes/java/io/ObjectInputFilter.java
--- a/src/java.base/share/classes/java/io/ObjectInputFilter.java
+++ b/src/java.base/share/classes/java/io/ObjectInputFilter.java
@@ -204,15 +204,14 @@
       * When setting the filter, it should be stateless and idempotent,
       * reporting the same result when passed the same arguments.
       * <p>
       * The filter is configured during the initialization of the {@code ObjectInputFilter.Config}
       * class. For example, by calling {@link #getSerialFilter() Config.getSerialFilter}.
-     * If the system property {@systemProperty jdk.serialFilter} is defined on the command line,
-     * it is used to configure the filter.
-     * If the system property is not defined on the command line, and the
-     * {@link java.security.Security} property {@code jdk.serialFilter} is defined
-     * then it is used to configure the filter.
+     * If the Java virtual machine is started with the system property
+     * {@systemProperty jdk.serialFilter}, its value is used to configure the filter.
+     * If the system property is not defined, and the {@link java.security.Security} property
+     * {@code jdk.serialFilter} is defined then it is used to configure the filter.
       * Otherwise, the filter is not configured during initialization and
       * can be set with {@link #setSerialFilter(ObjectInputFilter) Config.setSerialFilter}.
       * Setting the {@code jdk.serialFilter} with {@link System#setProperty(String, String)
       * System.setProperty} <em>does not set the filter</em>.

Thanks, Roger

Issue:
    https://bugs.openjdk.java.net/browse/JDK-8237651

Webrev:
     http://cr.openjdk.java.net/~rriggs/webrev-filter-8237651/