Previously `bandwidth.allocate()` was called twice in a row, once for
upload bandwidth and once for download bandwidth.
It has some semi-expensive housekeeping though, so avoid doing that work
twice by having a single call to `bandwidth.allocate()` operate on both
up and down bandwidth.
* refactor: group related functions together in the source
* refactor: make tr_peerIo::decrypt() private
* refactor: make tr_peerIo::is_seed() private
* refactor: remove unused tr_isPeerIo()
* refactor: move tr_tracker_http_announce() helper funcs into their own namespace
* refactor: move tr_globalIPv6() helper funcs into their own namespace
* refactor: move tr_address_is_valid_for_peers() helper funcs into their own namespace
* refactor: make tr_address_compare() a private method
* refactor: rename tr_address::isIPv4() to is_ipv4()
* refactor: use snake_case for tr_address methods
* refactor: make tr_address_is_valid_for_peers() a member function
* refactor: make tr_peer_socket.type private
* refactor: reimplement tr_peerIo::address() as a wrapper around tr_peer_socket::address()
* refactor: remove tr_address, tr_port from tr_peerIo
* refactor: replace tr_netClosePeerSocket() with tr_peer_socket::close()
* refactor: make tr_session.private_peer_port a private field
chore: make tr_session.public_peer_port a private field
* refactor: make tr_session.web_ a private field
* refactor: make tr_session.lpd_ a private field
* refactor: make tr_session.bind_ipv4_ private
refactor: make tr_session.bind_ipv6_ private
* refactor: make tr_session.bandwidth_groups_ private; add const accessor
* refactor: make tr_session.port_forwarding_ private
* refactor: make tr_session.peerMgr private pt 1: add tr_session::addIncoming()
* refactor: make tr_session.peerMgr private pt 1: add tr_session::addTorrent()
* refactor: make tr_session.peer_mgr_ private
* refactor: make tr_session.setPeerPort() private
* Sync translations with code
* Sync translations with Transifex
* Remove Mac menu title that isn't displayed and shouldn't be translated
* Add context to logging level strings in GTK client
* Use "µTP" consistently in code
* Use ellipsis instead of three docs in Qt client strings
* Close HTML tags in blocklist-related strings
* Remove trailing space from a translatable string in Qt client
* Add missing plural forms for English strings in Qt client
* Fix spelling: metaInfo -> metainfo
* refactor: add a Mediator class to decouple tr_session and tr_port_forwarding
* refactor: add tr_port_forwarding::Mediator::privatePeerPort()
* refactor: add tr_port_forwarding::Mediator::onPortForwarded()
* chore: avoid unnecessary include of timer.h in other headers
* refactor: use a uniform timerMaker() API in mediators
* refactor: make tr_peerIoSetEnabled() a member method
* refactor: make tr_peerIoFlushOutgoingProtocolMsgs() a member method
* refactor: make tr_peerIoFlush() a member method
* refactor: make tr_peerWriteBytes() a member method
* refactor: make tr_peerWriteBuf() a member method
* refactor: make tr_peerIoGetWriteBufferSpace() a member method
* chore: remove unused declaration
* refactor: make tr_peerIoUtpInit() a member method
* refactor: make tr_peerIoNew() a member method
* refactor: make tr_peerIoNewOutgoing() a member method
* refactor: make tr_peerIoNewIncoming() a member method
