* subversion/svn/svn.c
  (sub_main): Don't take an exclusive lock by default on Windows. TortoiseSVN
    appears to be our most used client, and would be unable to share working
    copies with 'svn' because of this default, as would other popular Windows
    clients. I can't speak for other platforms, but on Windows the average
    user uses more than 'svn' and as such likes clients to work together like
    they used to during Subversion 1.X instead of blocking each other.

    Without this optimization 1.8 is faster on Windows than 1.7 was and 1.7
    already was much faster than older versions.

    Also make it easier for other distributions to opt-out of this behavior
    change by using a specific define.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1447511 13f79535-47bb-0310-9956-ffa450edef68