SERVER-13439 Do not fall through Switch case to Bool case in options conversion
SERVER-13641 remove recovery unit passthroughs from operationcontext
SERVER-13944 New stack dump format, on non-Windows systems.

Implementation of the "somap" object, which can be used to identify the correct
binary from which to extract debug symbols and supports ASLR, is only implemented
on Linux.  Other POSIX systems still need work to implement that object.
Merge remote-tracking branch 'upstream/master'