Nothing ever made full use of the promise of the complexity of the
API (configuration that can change at runtime) anyway.
This includes completely ignoring the $APP_CONFIG variable.
I opened GitHub issues against the only Atmosphere packages that had
dependencies on application-configuration (none of which actually used
the package other than by declaring the dependency).
Also allow accounts-password email templates to set mail headers, and
for the From override to be a function rather than a constant.
Fixes#2858. Fixes#2854.
On re-connect, clients re-try methods that haven't received a response, which means that methods might be called multiple times. This is important to document so users know to guard against this behavior if a method has dangerous side-effects.
See issue #2407.
