* Refactored keydata handling.
* Sealed NCA KAEKs are now generated at startup, and NCA key area entries are now decrypted by keysDecryptNcaKeyAreaEntry(), reducing the number of calls to spl functions.
* The eTicket RSA device key is now retrieved and decrypted at startup. RSA-OAEP wrapped titlekeys are now decrypted by keysDecryptRsaOaepWrappedTitleKey().
* Renamed titlekek -> ticket common key throughout the codebase.
* Added NcaKeyAreaEncryptionKeyIndex_Count and NcaKeyGeneration_Max enum values to nca.h.
* Proper usage of strcasecmp() in some functions.
* Moved syscall hint checks from keys.c to mem.c.
* Define illegal FS characters as an array rather than a char pointer.
* Services are now initialized before the CFW type checks.
* Fixed pcv/clkrst service initialization.
* Implemented additional thread safety and logfile output to service functions.
* Slightly tweaked running service checks.
* Added proper Markdown documentation for the USB ABI.
* Avoid performing any crypto operations on null NCA key area entries.
* Added commented out code to handle the aes_ctr_ex NCA key area entry, just in case we end up needing it at some point.
These files will be modified to slowly add features from the nxdumptool rewrite codebase.
This commit effectively makes it impossible to build the previous PoC. The code from each PoC will be reused, though, so it hasn't been removed.
* Remove references to the secondary Nintendo Extended BFTTF because it's identical to the first one.
* Use format attribute in functions that need it (and fixed errors I made in the past).
