Use "cross" to cross-compile reqwest for Android. The job currently
errors out because the default linker doesn't know what to do with
object files generated for Android.
Now, callers have more control over the set of roots.
Note that, due to cargo unification, other dependencies in the
dependency tree might enable rustls-tls-webpki-roots
or rustls-tls.
This will affect connections initiated by code that explicitly
enabled rustls-tls-manual-roots.
So for now, the choice is done once per entire cargo
dependency graph. If people want more precise control
over things, they can add methods that allow controlling
this on a per-connection level. Even if such methods
are available, the *-manual-roots feature will still be
helpful with eliminating the webpki-roots dependency
for those cargo graphs where there is no unification.
The "socks" feature has been removed for a while now, the optional
dependency on the "socks" crate commented out.
The code for actually providing the socks feature was, however, still
mostly present, if a bit out of date.
This commit re-adds the socks feature using the tokio-socks (instead of
socks) crate.
Closes#620
To allow for the default-tls to change to a different backend by
default, this adds a new `native-tls` optional feature. Any TLS feature
that was only available using native-tls now requires the `native-tls`
feature to be enabled.
