* refactor: add fetch options object to tr_webRun()
Fold `tr_webRun()`, `tr_webRunWithCookies()`, and `tr_webRunWebseed()`
into a single API that takes an options argument that callers can
customize to their needs.
Also does a surface cleanup pass to the tr_webseed and tr_web internal
structures, e.g. making fields const where possible, not using raw
pointers, and making some fields private.
This revision is still full of code smells. Refactoring the entire
system is overwhelming, so instead I'm doing it in incremental steps.
* 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
* (C++) Macros should not be used to define constants
* (C++) Memory should not be managed manually
* (C++) "void*" should not be used in typedefs, member variables, function parameters or return type
* (C++) When the "Rule-of-Zero" is not applicable, the "Rule-of-Five" should be followed
* (C++) "switch" statements should have "default" clauses
* (C++) "explicit" should be used on single-parameter constructors and conversiosn operators
* (C++) Non-const global variables should not be used
Charles Kerr