This is required to allow the compiler to successfully instantiate a
JsonCodec::Handler<DynamicValue, Style::POINTER> using Handler's default
partial specialization for Style::POINTER. Such an instantiation is
currently only used in dead code that clang and gcc eliminate but MSVC
does not, which is why the problem was not caught until now.

Also implemented DynamicValue::Builder::as<DynamicValue>() to preserve
symmetry.

For now, I'm just guessing on appropriate values for minStack and
maxStack.

The implementation used by AsyncStreamFd was simply calling the general tryRead(), so why not?

Previously, in the presence of promise capabilities, a save() request could cross over the same gateway twice (or more!). Some gateways (e.g. Sandstorm's) implement one-way transformations, so this could cause the request to fail when it shouldn't.

Fix as done elsewhere so that it builds correctly on Musl libc
as well as Glibc.
Signed-off-by: Justin Cormack <justin@specialbusservice.com>

Add missing include when building on Linux

Discovered trying to build on Android using CMake.  UIO_MAXIOV is only
exported by the linux/uio.h header which was never included.  Not sure
how normal Linux builds work.

Add missing reinterpret cast from const void* to const byte*.

Remove -pthread compile flag when building under Android.  ANDROID cmake
variable exported by android-cmake project.

Fixes #349.

Since simply fixing the bug would silently break backwards-compatibility for affected schemas, we instead throw an exception to alert developers.

See Issue #344 for more details.

https://github.com/sandstorm-io/capnproto/issues/334

This is blunt: A peer can choose to stop reading new messages from a connection whenever the calls in-flight cross a certain threshold. This is needed in Sandstorm to prevent errant (or malicious) apps from consuming excessive RAM in other parts of the system by flooding them with calls.