Set root of docbook stuff from buildenv.bat and not from builddoc.bat.

Fix calling for file renaming when cd:ed into a different directory.

src/tools/msvc/builddoc.bat

 @echo off
-REM Adjust path for your docbook installation
-SET ROOT=c:\prog\pgsql\docbook
+REM Adjust path for your docbook installation in buildenv.bat
 
 SETLOCAL
 SET STARTDIR=%CD%
@@ -9,27 +8,27 @@ SET DSSSL=docbook-dsssl-1.79
 
 IF EXIST ..\msvc IF EXIST ..\..\..\src cd ..\..\..
 IF NOT EXIST doc\src\sgml\version.sgml goto noversion
+IF EXIST src\tools\msvc\buildenv.bat CALL src\tools\msvc\buildenv.bat
 
-IF NOT EXIST %ROOT%\%OPENJADE% SET NF=OpenJade
-IF NOT EXIST %ROOT%\docbook SET NF=docbook
-IF NOT EXIST %ROOT%\%DSSSL% set NF=docbook-dssl
+IF NOT EXIST %DOCROOT%\%OPENJADE% SET NF=OpenJade
+IF NOT EXIST %DOCROOT%\docbook SET NF=docbook
+IF NOT EXIST %DOCROOT%\%DSSSL% set NF=docbook-dssl
 
 IF NOT "%NF%" == "" GOTO notfound
 
 IF "%1" == "renamefiles" GOTO renamefiles
 
-cmd /v /c "%0" renamefiles
-
+cmd /v /c src\tools\msvc\builddoc renamefiles
 cd doc\src\sgml
 
-SET SGML_CATALOG_FILES=%ROOT%\%OPENJADE%\dsssl\catalog;%ROOT%\docbook\docbook.cat
-perl %ROOT%\%DSSSL%\bin\collateindex.pl -f -g -o bookindex.sgml -N
+SET SGML_CATALOG_FILES=%DOCROOT%\%OPENJADE%\dsssl\catalog;%DOCROOT%\docbook\docbook.cat
+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
 
-%ROOT%\%OPENJADE%\bin\openjade -V draft-mode -wall -wno-unused-param -wno-empty -D . -c %ROOT%\%DSSSL%\catalog -d stylesheet.dsl -i output-html -t sgml postgres.sgml
-perl %ROOT%\%DSSSL%\bin\collateindex.pl -f -g -i 'bookindex' -o bookindex.sgml HTML.index
-%ROOT%\%OPENJADE%\bin\openjade -V draft-mode -wall -wno-unused-param -wno-empty -D . -c %ROOT%\%DSSSL%\catalog -d stylesheet.dsl -i output-html -t sgml postgres.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
+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
 
 cd %STARTDIR%
 echo Docs build complete.
@@ -38,7 +37,7 @@ exit /b
 
 :renamefiles
 REM Rename ISO entity files
-CD %ROOT%\docbook
+CD %DOCROOT%\docbook
 FOR %%f in (ISO*) do (
    set foo=%%f
    IF NOT "!foo:~-4!" == ".gml" ren !foo! !foo:~0,3!-!foo:~3!.gml