svn - 允許commit之後修改log

參考：Subversion 不能修改紀錄訊息

1. 切換到想要的repository/hooks
2. 使用mv pre-revprop-change.tmpl pre-revprop-change
3. chmod +x pre-revprop-change (將檔案加入執行權限)
4. vi pre-revprop-change，修改後內容如下
   
   REPOS="$1"
   REV="$2"
   USER="$3"
   PROPNAME="$4"
   ACTION="$5"
   
   
   if [ "$ACTION" = "M" -a "$PROPNAME" = "svn:log" ]; then exit 0; fi
   
   
   echo "Changing revision properties other than svn:log is prohibited" >&2
   exit 1
5. 存檔離開，就可以edit log了