Fix four issues with wallet_keys_unlocker:
1. It won't decrypt if there are unlockers open simulataneously on multiple `wallet2` instances
2. It won't decrypt if the first unlocker was disabled (i.e. `locked=false`), even with a second non-disabled unlocker
3. If a destructor of an earlier unlocker is triggered before the destructor of a later unlocker, it will re-encrypt too early, while the second unlocker is still in scope
4. Calling the 3-parameter constructor with `locked=true` after an unlocker already exists will "double-encrypt" the spend key after its destructor since the local variable is `locked=false` and the field member is `locked=true`
Also, replace `wallet2::decrypt_account_for_multisig` with `wallet_keys_unlocker`.
Reduce the likelihood of false positive failures in the p2p
transaction propagation functional test by waiting up to a
maximum timeout for a transaction to propagate, rather than using a
fixed timeout, to reflect the random delay of Dandelion++ transaction
propagation. This strategy also speeds test execution in cases where
propagation occurs faster than the previously expected fixed delay.
* Use a global startup timeout, and apply it to each socket's connect
call, rather than repeating connection attempts with short timeouts.
* Avoid leaking sockets by closing them.
Correct the unit tests for tools::is_hdd to avoid making assumptions
about the configuration of a particular device based solely on the
value of the __GLIBC__ preprocessor flag. Instead, rely on the
test invoker to provide paths for devices of specific types via
the process environment, thereby avoiding faulty assumptions and
improving the specificity of test assertions. To ensure appropriate
devices exist, add a script, tests/create_test_disks.sh, which
configures loopback devices mirroring relevant configurations.
1. Use `std::is_standard_layout` and `std::is_trivially_copyable` instead of `std::is_pod` for KV byte-wise serialization, which fixes compile issue for Boost UUIDs
2. Use `std::has_unique_object_representations` instead of `alignof(T) == 1` for epee byte spans and epee hex functions
3. Removed reimplementation of `std::hash` for `boost::uuids::uuid
4. Removed `<<` operator overload for `crypto::secret_key`
5. Removed instances in code where private view key was dumped to the log in plaintext
