[Bug libstdc++/51701] Remove reference to Henry Suter's RWLock from documentation

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51701

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-29 
15:41:45 UTC ---
Author: redi
Date: Thu Dec 29 15:41:37 2011
New Revision: 182724

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182724
Log:
    PR libstdc++/51701
    * doc/xml/manual/extensions.xml (Input and Output): Remove reference
    to RWLock class.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/doc/xml/manual/extensions.xml