Document that new files that do not have the FreeBSD=%H svn property

set will be rejected when committing, and link to the Adding/Removing
files section of the Subversion Primer.

Prompted by:	jkois, tj

en_US.ISO8859-1/articles/committers-guide/article.sgml

@@ -2716,6 +2716,19 @@ $target - head/$source:$P,$Q,$R</screen>
 	<para>This is a relatively easy task, but remains a good first test of
 	  your version control skills.</para>
 
+	<important>
+	  <para>New files that do not have the
+	    <literal>FreeBSD=%H</literal> <command>svn</command>
+	    property will be rejected when committed to the
+	    repository.  Be sure to read the <ulink
+	      url="&url.base;/doc/en_US.ISO8859-1/articles/committers-guide/article.html#AEN1067">Subversion Primer</ulink>
+	    section regarding adding and removing files, in addition
+	    to verifying <filename>~/.subversion/config</filename>
+	    contains the necessary &quot;auto-props&quot;
+	    entries in <filename>auto-props.txt</filename> mentioned
+	    there.</para>
+	</important>
+
 	<note>
 	  <para>Don't forget to get mentor approval for these patches!</para>
 	</note>