在 Quick Server 安装目录外执行 stop_quick_server.sh/start_quick_server.sh 等脚本时，无法读取 conf/config.lua 文件

[dualface]

错误信息：

/opt/quick_server/bin/openresty/luajit/bin/lua: (command line):1: module 'conf.config' not found:
    no field package.preload['conf.config']
    no file './conf/config.lua'
    no file '/opt/quick_server/bin/openresty/luajit/share/luajit-2.1.0-alpha/conf/config.lua'
    no file '/usr/local/share/lua/5.1/conf/config.lua'
    no file '/usr/local/share/lua/5.1/conf/config/init.lua'
    no file '/opt/quick_server/bin/openresty/luajit/share/lua/5.1/conf/config.lua'
    no file '/opt/quick_server/bin/openresty/luajit/share/lua/5.1/conf/config/init.lua'
    no file './conf/config.so'
    no file '/usr/local/lib/lua/5.1/conf/config.so'
    no file '/opt/quick_server/bin/openresty/luajit/lib/lua/5.1/conf/config.so'
    no file '/usr/local/lib/lua/5.1/loadall.so'
    no file './conf.so'
    no file '/usr/local/lib/lua/5.1/conf.so'
    no file '/opt/quick_server/bin/openresty/luajit/lib/lua/5.1/conf.so'
    no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
    [C]: in function 'require'
    (command line):1: in main chunk
    [C]: at 0x004049d0

[existnon]

加入了版本号显示之后引入的bug。 @fa83dd9eeb1a8544cceb285da7704f9e1d269fe8 修正这个问题。