reformat using ocp-indent
Adapt the Stack interfaces to the v1.1.1 mirage-types interface

(see mirage/mirage#226 for details)
Set `SO_REUSEADDR` on listening sockets for Unix

Closes mirage/mirage#218
Sockets: Catch and ignore top-level exceptions rather than kill program

We may want to log these in the future, but for now there shouldn't
really be any toplevel exceptions, so just discard them.

Closes mirage/mirage#219
sync CHANGES
Merge pull request #47 from avsm/master

Adapt the Stack interfaces to the v1.1.1 mirage-types interface