Function xmlCatalogResolve 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlCatalogResolve(
    pubID: *const xmlChar,
    sysID: *const xmlChar,
) -> *mut xmlChar

Global resolution: public ID first, then system ID (upstream xmlCatalogResolve).

UPSTREAM-PARITY

The system ID is tried first when provided (xmlCatalogXMLResolve order).