add_header_redefinition doesn't consider headers from include files

[Bub-la-bub]

We have location blocks which use add_header to add additional headers but these blocks also use an include statement to bring in a configuration file which defines the same headers used in the parent block (the parent includes the same file) - so the location block will have the same headers as the parent as well as the new headers specific to the location block, however Gixy flags these location blocks as "Problem: [add_header_redefinition] Nested "add_header" drops parent headers.".

We can confirm the headers are not dropped by inspecting headers for those locations in a browser, but Gixy appears to not parse the include statements at this level and assumes the parent headers were dropped.