Filter out warnings coming from the stylesheets, so that actual warnings show up properly.

Show some minor progress messages.

src/tools/msvc/builddoc.bat

@@ -26,9 +26,12 @@ perl %DOCROOT%\%DSSSL%\bin\collateindex.pl -f -g -o bookindex.sgml -N
 perl mk_feature_tables.pl YES ..\..\..\src\backend\catalog\sql_feature_packages.txt ..\..\..\src\backend\catalog\sql_features.txt > features-supported.sgml
 perl mk_feature_tables.pl NO ..\..\..\src\backend\catalog\sql_feature_packages.txt ..\..\..\src\backend\catalog\sql_features.txt > features-unsupported.sgml
 
-%DOCROOT%\%OPENJADE%\bin\openjade -V draft-mode -wall -wno-unused-param -wno-empty -D . -c %DOCROOT%\%DSSSL%\catalog -d stylesheet.dsl -i output-html -t sgml postgres.sgml
+echo Running first build...
+%DOCROOT%\%OPENJADE%\bin\openjade -V draft-mode -wall -wno-unused-param -wno-empty -D . -c %DOCROOT%\%DSSSL%\catalog -d stylesheet.dsl -i output-html -t sgml postgres.sgml 2>&1 | findstr /V "DTDDECL catalog entries are not supported"
+echo Running collateindex...
 perl %DOCROOT%\%DSSSL%\bin\collateindex.pl -f -g -i 'bookindex' -o bookindex.sgml HTML.index
-%DOCROOT%\%OPENJADE%\bin\openjade -V draft-mode -wall -wno-unused-param -wno-empty -D . -c %DOCROOT%\%DSSSL%\catalog -d stylesheet.dsl -i output-html -t sgml postgres.sgml
+echo Running second build...
+%DOCROOT%\%OPENJADE%\bin\openjade -V draft-mode -wall -wno-unused-param -wno-empty -D . -c %DOCROOT%\%DSSSL%\catalog -d stylesheet.dsl -i output-html -t sgml postgres.sgml 2>&1 | findstr /V "DTDDECL catalog entries are not supported"
 
 cd %STARTDIR%
 echo Docs build complete.