Functions are now marked as "FAKE?" instead of "FAKE" in cases where it's possible that they only seem fake due to the linker map not showing duplicate symbols multiple times (inlines used in multiple TUs).

"UNREFERENCED DUPLICATE" data in the base maps are now also taken into account. Also, limited linkage diffing can be done for main.dol symbols (based on the naming convention of l_ and g_ prefixes).

Auto-detect if the TU is in main.dol or a REL. Detect this separately for the target and the base, in order to support TUs like d_a_npc_tt which are in main.dol for the debug build, but a REL for release builds. And disable linkage comparison when comparing a REL TU to a main.dol TU as the official main.dol maps do not include linkage information, but the REL maps do.

Support checking linkage diffs, and checking if REL data symbols are missing/misnamed.