Doxyfile: Ignore signal.h

Author: adazem009

Doxyfile

@@ -958,7 +958,8 @@ RECURSIVE              = YES
 # run.
 
 EXCLUDE                = docs/theme \
-                         include/scratchcpp/spimpl.h
+                         include/scratchcpp/spimpl.h \
+                         include/scratchcpp/signal.h
 
 # The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
 # directories that are symbolic links (a Unix file system feature) are excluded