* refactor: tr_torrentGetMetadataPiece() returns an optional vector
* refactor: use tr_pathbuf in create_temp_path()
* refactor: use tr_pathbuf in win32 create_temp_path()
* refactor: use std::vector in isPeerInteresting()
* refactor: remove tr_new0 from tr_peerMgrPeerStats()
* refactor: remove tr_new0 from rechokeUploads()
* refactor: silence clang nullptr dereference warning
* refactor: make tr_natpmp a C++ class
* refactor: use std::string in tr_log_message
* feat: add convenience variants of TimerMaker::create()
* refactor: use libtransmission::Timer in peer-mgr
* refactor: use libtransmission::Timer in peer-msgs
* refactor: use libtransmission::Timer in tr-utp
* refactor: use libtransmission::Timer in tr-dht
* refactor: use libtransmission::Timer in port-forwarding
* refactor: use libtransmission::Timer in webseed
* refactor: use libtransmission::Timer in tr-lpd
* refactor: use libtransmission::Timer in rpc-server
* chore: remove unused function tr_timerAdd()
* chore: remove unused function tr_gettimeofday()
* fixup! chore: remove unused function tr_timerAdd()
* fixup! refactor: use libtransmission::Timer in port-forwarding
* refactor: use std::string in tr_watchdir_inotify_on_event()
* refactor: add template tr_variantFromBuf() variant
if it has .data() and .size() it is good
* fix: bugprone-assignment-in-if-condition warning in tr_bitfield::countFlags()
* fix: bugprone-assignment-in-if-condition warning in tr_watchdir_generic_new()
* fix: bugprone-assignment-in-if-condition warning in torrentRenamePath()
* fix: bugprone-assignment-in-if-condition warning in tr_watchdir_inotify_on_event()
* fix: bugprone-assignment-in-if-condition warning in tr_variantWalk()
* fix: misc-const-correctness warning in TrackerDelegate::getText()
* fix: bugprone-assignment-in-if-condition warning in Session::updateStats()
* fix: performance-unnecessary-value-param warning in discoverThreadfunc()
* fix: clang-analyzer-core.UndefinedBinaryOperatorResult warning in tr_completion::setHasAll()
* fix: clang-analyzer-core.UndefinedBinaryOperatorResult warning in tr_torrentFileCompleted()
* fix: silence clang-analyzer-cplusplus.NewDelete warning when using QPointer
This appears to be a false positive; added NOLINT
* refactor: use the std::vector variant of tr_loadFile() in rpc-server.cc
* refactor: use the std::vector variant of tr_loadFile() in rename-test.cc
* refactor: remove the unused raw ptr variant of tr_loadFile()