* refactor: tr_ctorSaveContents takes a string_view filename
* refactor: remove tr_ctorSaveMagnetContents
* refactor: announce_list::save takes a std::string_view
* refactor: magnet() takes an OutputIt arg
Generate the magnet link URL into an output iterator
* refactor: remove deprecated calls to tr_http_escape
* refactor: tr_torrent.torrentFile takes an OutputIterator
* refactor: tr_torrent.torrentFile returns a tr_pathbuf
* refactor: tr_torrent_metainfo.makeFilename returns a tr_pathbuf
* refactor: use tr_urlbuf in announcer-http
* fix: make variable a pointer-to-const
* fix: use init-statement to reduce variable scope
* fix: implicit conversion from long to int
* fix: refactor to not nest more than 3 if|for|do|while|switch statements
* fix: make tr_session::setSocketTos() const
* fix: use array.prototype.some instead of a for loop
* refactor: use nullptr instead of NULL
* fix: oops
* refactor: include <memory> when using shared_ptr or unique_ptr
* refactor: include <cstdio> iff we use it
* refactor: include <cstring> iff we use it
* refactor: include <cstdlib> iff we use it
* refactor: include <string_view> or <string> iff we use it
* refactor: include <array> iff we use it
* refactor: include <ctime> iff we use it
* refactor: include <cctype> iff we use it
* refactor: misc #include cleanups in libtransmission