Changes to process(3)

Changes to process:
commit b2f11335b5fcc0e5b421f16da78f11c558eba574
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Dec 1 11:25:04 2013 +0100

    Minor update to changelog file

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

commit edda1be660d07b461da75b2dfacc3d5820b4d084
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Dec 1 11:21:19 2013 +0100

    Add Haddock note to `call{Command,Process}` wrt execptions (#2233)

    This also tweaks Haddock comments & markup in "System.Process" while at it.

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

commit 776a260be009cc27cfeacf298934d544c4e87408
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Dec 1 11:15:44 2013 +0100

    Make `cleanupProcess` resistant to SIGPIPE

    Otherwise, `cleanupProcess` may exit prematurely if trying to flush out
    data to the process' stdin handle even though the endpoint has already
    vanished, and fail to complete the cleanup process.

    See also 228297ec53e9ee7a1a6a3c5964ca7e89a6474c9b and #2233.

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>