xmldoc: Fix issue with xmlstarlet validation

Added the missing xml-stylesheet and Xinclude namespace
declarations in pjsip_config.xml and pjsip_manager.xml.

Updated make_xml_documentation to show detailed errors when
xmlstarlet is the validator.  It's now run once with the '-q'
option to suppress harmless/expected messages and if it actually
fails, it's run again without '-q' but with '-e' to show
the actual errors.

Change-Id: I4bdc9d2ea6741e8d2e5eb82df60c68ccc59e1f5e

build_tools/make_xml_documentation

@@ -224,7 +224,8 @@ for subdir in ${mod_subdirs} ; do
 			if [ "${XMLLINT}" != ":" ] ; then
 				${XMLLINT} --dtdvalid "${source_tree}/doc/appdocsxml.dtd" --path "${source_tree}/doc" --noout "${i}" || { echo "" ; exit 1 ; }
 			else
-				${XMLSTARLET} val -d "${source_tree}/doc/appdocsxml.dtd" "${i}" || { echo "" ; exit 1 ; }
+				${XMLSTARLET} val -q -d "${source_tree}/doc/appdocsxml.dtd" "${i}" ||
+					${XMLSTARLET} val -e -d "${source_tree}/doc/appdocsxml.dtd" "${i}" || { echo "" ; exit 1 ; }
 			fi
 		fi
 		${SED} -r "/^\s*(<[?]xml|<.DOCTYPE|<.?docs)/d" "${i}" >> "${output_file}"
@@ -241,7 +242,8 @@ if [ "${validate}" -eq "1" ] ;then
 	if [ "${XMLLINT}" != ":" ] ; then
 		${XMLLINT} --dtdvalid "${source_tree}/doc/appdocsxml.dtd" --path "${source_tree}/doc" --noout "${output_file}" || exit 1
 	else
-		${XMLSTARLET} val -d "${source_tree}/doc/appdocsxml.dtd" "${output_file}" || exit 1
+		${XMLSTARLET} val -q -d "${source_tree}/doc/appdocsxml.dtd" "${output_file}" ||
+			${XMLSTARLET} val -e -d "${source_tree}/doc/appdocsxml.dtd" "${output_file}" || { echo "" ; exit 1 ; }
 	fi
 fi
 

res/res_pjsip/pjsip_config.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE docs SYSTEM "appdocsxml.dtd">
-<docs>
+<?xml-stylesheet type="text/xsl" href="appdocsxml.xslt"?>
+<docs xmlns:xi="http://www.w3.org/2001/XInclude">
 	<configInfo name="res_pjsip" language="en_US">
 		<synopsis>SIP Resource using PJProject</synopsis>
 		<configFile name="pjsip.conf">

res/res_pjsip/pjsip_manager.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE docs SYSTEM "appdocsxml.dtd">
-<docs>
+<?xml-stylesheet type="text/xsl" href="appdocsxml.xslt"?>
+<docs xmlns:xi="http://www.w3.org/2001/XInclude">
 	<manager name="PJSIPQualify" language="en_US">
 		<synopsis>
 			Qualify a chan_pjsip endpoint.