This change deletes the `SecretKey` equality/inequality operators from the public library header and moves the comparison logic into test-only code.
Specifically, the `operator==` and `operator!=` free functions on `SecretKey` have been removed from `include/xrpl/protocol/SecretKey.h` and have been replaced with explicitly deleted member functions to prevent accidental use in production code. A named `test::equal()` helper has also been added in `src/test/unit_test/utils.h` for test assertions that need to compare secret keys.
The rdb module was not properly designed, which is fixed in this change. The module had three classes:
1) The abstract class `RelationalDB`.
2) The abstract class `SQLiteDatabase`, which inherited from `RelationalDB` and added some pure virtual methods.
3) The concrete class `SQLiteDatabaseImp`, which inherited from `SQLiteDatabase` and implemented all methods.
The updated code simplifies this as follows:
* The `SQLiteDatabaseImp` has become `SQLiteDatabase`, and
* The former `SQLiteDatabase `has merged with `RelationalDatabase`.
This change modularizes the `WalletDB` and `Manifest`. Note that the wallet db has nothing to do with account wallets and it stores node configuration, which is why it depends on the manifest code.
Currently we're passing the `Application` object around, whereby the `Application` class acts more like a service registry that gives other classes access to other services. In order to allow modularization, we should replace `Application` with a service registry class so that modules depending on `Application` for other services can be moved easily. This change adds the `ServiceRegistry` class.
`PeerImp` processes `TMGetObjectByHash` queries with an unbounded per-request loop, which performs a `NodeStore` fetch and then appends retrieved data to the reply for each queried object without a local count cap or reply-byte budget. However, the `Nodestore` fetches are expensive when high in numbers, which might slow down the process overall. Hence this code change adds an upper cap on the response size.
This change makes the regex in `HttpClient.cpp` that matches the content-length http header case insensitive to improve compatibility, as http headers are case insensitive.
