允许修改Svn注释

hooks目录下面的那些示例是用在linux下面的，在windows中无法运行，需要修改。 

在hooks目录下面增加pre-revprop-change.bat，内容：

# Here is an example hook script, for a Unix /bin/sh interpreter.# For more examples and pre-written hooks, see those in

# the Subversion repository at

# [url]http://svn.collab.net/repos/svn/trunk/tools/hook-scripts/[/url] and

# [url]http://svn.collab.net/repos/svn/trunk/contrib/hook-scripts/[/url]

rem Only allow log messages to be changed.

if "%4" == "svn:log" exit 0

echo Property '%4' cannot be changed >&2

exit 1