[doxy] Speed up doxygen.warnings.report.sh run

doc/.gitignore

@@ -1,4 +1,5 @@
 html/
+html-warn/
 latex/
 ns3-object.txt
 introspected-doxygen.h

doc/doxygen.conf

@@ -2180,7 +2180,7 @@ HIDE_UNDOC_RELATIONS   = YES
 # set to NO
 # The default value is: NO.
 
-HAVE_DOT               = yes
+HAVE_DOT               = YES
 
 # The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
 # to run in parallel. When set to 0 doxygen will base this on the number of

doc/doxygen.warnings.report.sh

@@ -213,7 +213,7 @@ else
 
     conf=$DIR/doxygen.conf
 
-    sed -i.bak -E '/^(EXTRACT_ALL|HAVE_DOT|CLASS_DIAGRAMS|WARNINGS|SOURCE_BROWSER) /s/YES/no/;/^HTML_OUTPUT /s/html/html-warn/' $conf
+    sed -i.bak -E '/^(EXTRACT_ALL|HAVE_DOT|CLASS_DIAGRAMS|WARNINGS|SOURCE_BROWSER) /s/(YES|yes)/no/;/^HTML_OUTPUT /s/html/html-warn/' $conf
 
     verbose -n "Rebuilding doxygen (v$(doxygen --version)) docs with full errors..."
     (cd "$ROOT" && ./waf --doxygen-no-build >&6 2>&6 )