[dox] extract only documented files, strip code comments again...

Doxyfile

@@ -355,7 +355,7 @@ LOOKUP_CACHE_SIZE      = 0
 # Private class members and static file members will be hidden unless
 # the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES
 
-EXTRACT_ALL            = YES
+EXTRACT_ALL            = NO
 
 # If the EXTRACT_PRIVATE tag is set to YES all private members of a class
 # will be included in the documentation.
@@ -808,7 +808,7 @@ INLINE_SOURCES         = NO
 # doxygen to hide any special comment blocks from generated source code
 # fragments. Normal C, C++ and Fortran comments will always remain visible.
 
-STRIP_CODE_COMMENTS    = NO
+STRIP_CODE_COMMENTS    = YES
 
 # If the REFERENCED_BY_RELATION tag is set to YES
 # then for each documented function all documented