daemon-rpc: doc undocumented fields

[hinto-janai]

What

Adds documentation for undocumented request/response fields within daemon RPC calls; requires review into monerod.

Some of these are lacking descriptions as I'm not sure what the behavior is for some of the fields. I will know after https://github.com/Cuprate/cuprate/issues/244 and may add more docs then.

Fixes

Table of fixes in this PR, originally tracked here: https://github.com/Cuprate/cuprate/issues/159.

Request fields

These endpoints/methods have undocumented request fields.

Endpoint/method	Link	Notes
get_block_header_by_hash	rpc/core_rpc_server_commands_defs.h @ 1245	hashes. This field lets you specify multiple block hashes.
hard_fork_info	rpc/core_rpc_server_commands_defs.h @ 1962, rpc/core_rpc_server.cpp @ 2760	version. This field lets you specify which hardfork info to retrieve.
get_output_distribution	rpc/core_rpc_server_commands_defs.h @ 2445..2465	top_hash, credits
/get_blocks.bin	rpc/core_rpc_server_commands_defs.h @ 174..179	Optional fields: requested_info, no_miner_tx, pool_info_since
/send_raw_transaction	rpc/core_rpc_server_commands_defs.h @ 617	do_sanity_checks
/get_peer_list	rpc/core_rpc_server_commands_defs.h @ 1373..1374	public_only, include_blocked
/out_peers	rpc/core_rpc_server_commands_defs.h @ 1909	set

Response fields

These endpoints/methods have undocumented response fields.

Endpoint/method	Link	Notes
get_block_header_by_hash	rpc/core_rpc_server_commands_defs.h @ L1260	block_headers. This method will return a block_header AND block_headers if the request only provided a hashes. The block_header struct is a bunch of default values (0, "", false).
get_block_header_by_height	rpc/core_rpc_server_commands_defs.h @ 1271..1296	top_hash, credits
get_output_distribution	rpc/message_data_structs.h @ 205	Field in inner struct output_distribution: cumulative
get_connections	cryptonote_protocol/cryptonote_protocol_defs.h @ 47..87	Fields in inner struct connection_info: address_type, rpc_port, rpc_credits_per_hash, pruning_seed
set_bans	rpc/core_rpc_server_commands_defs.h @ 2063	untrusted
get_version	rpc/core_rpc_server_commands_defs.h @ 2170..2211	current_height, hard_forks, target_height
sync_info	rpc/core_rpc_server_commands_defs.h @ 2433	untrusted
get_txpool_backlog	diff @ 1567..1575, rpc/core_rpc_server_commands_defs.h @ 1639	Field rename: blob_size -> weight
get_output_distribution	rpc/core_rpc_server_commands_defs.h @ 2445..2465	top_hash, credits
add_aux_pow	rpc/core_rpc_server_commands_defs.h @ 1103	status, untrusted
/get_blocks.bin	rpc/core_rpc_server_commands_defs.h @ 232..240	daemon_time, credits, top_hash
/get_blocks_by_height.bin	rpc/core_rpc_server_commands_defs.h @ 281	credits, top_hash
/get_hashes_fast.bin	rpc/core_rpc_server_commands_defs.h @ 331	credits, top_hash
/get_o_indexes.bin	rpc/core_rpc_server_commands_defs.h @ 505	credits, top_hash
/get_transactions	rpc/core_rpc_server_commands_defs.h @ 418	credits, confirmations
/send_raw_transaction	rpc/core_rpc_server_commands_defs.h @ 640..643	nonzero_unlock_time, sanity_check_failed, too_few_outputs, tx_extra_too_big
/get_peer_list	rpc/core_rpc_server_commands_defs.h @ 1390	untrusted
/stop_daemon	rpc/core_rpc_server_commands_defs.h @ 1827	untrusted
submit_block	rpc/core_rpc_server_commands_defs.h @ 1123	block_id, status, untrusted

Other

The get_output_distribution method has 2 undocumented fields, binary and compress. The current documentation is also incorrect as the output is not an array of distribution JSON objects, but rather, either raw binary or a JSON byte array. This may change with https://github.com/monero-project/monero/issues/9422 so it is not changed in this PR.