Update the doxygen configuration file.
Minor updates/fixes to the source documentation.
diff --git a/doxygen/swrast.doxy b/doxygen/swrast.doxy
index 7b38eac..b0ba953 100644
--- a/doxygen/swrast.doxy
+++ b/doxygen/swrast.doxy
@@ -39,7 +39,7 @@
#---------------------------------------------------------------------------
# Configuration::addtions related to external references
#---------------------------------------------------------------------------
-TAGFILES = core.tag=../core \
+TAGFILES = main.tag=../core \
math.tag=../math \
tnl_dd.tag=../tnl_dd \
swrast_setup.tag=../swrast_setup \