add cleanup to remove dead code comments

Remove comments like
 /* foo(bar); */
and
 /* foo->bar = baz; */
and
 /* foo = bar->baz; */

This doesn't get rid of all dead code. As usual the result was visually
checked for false positives to ensure that no accidental content
removals occurred.

(cherry picked from commit f2d0a35a)

cleanup/cleanup.sh

@@ -43,6 +43,15 @@ sed -i 's|\(\s\+\)RET(\(.*\));|\1return \2;|' *.c
 sed -i 's|.*#define\s\+RET\(.*\).*||' *.h
 
 
+# remove dead code disguised as comments
+# weed out function calls first
+sed -i 's|/\*\s*.*(.*);.*\*/||g' *.c *.h
+# weed out assignments involving struct members
+sed -i 's|/\*\s*.*\..*=.*;.*\*/||g' *.c *.h
+sed -i 's|/\*\s*.*->.*=.*;.*\*/||g' *.c *.h
+sed -i 's|/\*\s*.*=.*->.*;.*\*/||g' *.c *.h
+
+
 # Insert new cleanup steps above this comment.
 # Keep Lindent as the last step.