Missing document about .eventlog's u flag

[shelarcy]

GHC 7.4.1 RC 1 User's Guide and Debug.Trace modules' document doesn't describe -l option's u flag.

•  http://www.haskell.org/pipermail/cvs-ghc/2011-October/067200.html
• http://www.haskell.org/ghc/dist/stable/docs/html/libraries/base-4.5.0.0/Debug-Trace.html#v:traceEvent
• http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/runtime-control.html#rts-eventlog

ThreadScope? tutrial already shows u flag. So, I think this is important flag.

•  http://www.haskell.org/haskellwiki/ThreadScope_Tour/RTS

[igloo]

Duncan, do you know who's responsible for this? Could you ask them to document it please?

[duncan@…]

commit 050f714150282695746534174c4550c90c2d9f4e

Author: Duncan Coutts <duncan@well-typed.com>
Date:   Thu Mar 22 23:24:57 2012 +0000

    Update the user guide with details on new flag +RTS -lu
    
    It's for user events emitted from Haskell code, like traceEvent.
    Fixes #5790

 docs/users_guide/runtime_control.xml |   43 +++++++++++++++++++--------------
 1 files changed, 25 insertions(+), 18 deletions(-)

[pcapriotti]

Merged as 49b9a36c1c8e390d5b4f79606e4cb8a813179b9d.