前提：服务器是Windows下的VisualSVN Server
1、在库的属性页面的Hooks选项卡下找到Pre-revision property change hook,
2、双击修改其内容，具体内容如下：
SET REPOS="%1"
SET REV="%2"
SET USER="%3"
SET PROPNAME="%4"
SET ACTION="%5"
IF %ACTION% == "M" (IF %PROPNAME% == "svn:log" (EXIT 0))
ECHO "Changing revision properties %PROPNAME% is prohibited" >&2
EXIT 1
