Update lang.js

“指定建立连接是使用的用户名” ==》 “指定建立连接时使用的用户名”
Merge pull request #500 from crazier9527/patch-1

Update lang.js
improve sqlwall
Merge pull request #503 from cutedemons/master

improve sqlwall
fix parse create table bug
Merge pull request #504 from cutedemons/master

fix parse create table bug
modify version
Merge pull request #505 from cutedemons/master

modify version
fix parse create table bug
Merge pull request #506 from cutedemons/master

fix parse create table bug
fix bug: parse error 'alter table t1 rename to/as t2'
Merge pull request #507 from yakolee/master

fix bug: parse error 'alter table t1 rename to/as t2'
sql wall allow rename table
add test fro sql wall renameTableAllow
bugfix: parse error for 'alter table xx comment 'xx''
Merge remote-tracking branch 'upstream/master'
Merge pull request #508 from yakolee/master

improve sql parser & sql wall
fix issues #509
improve sql wall
modify version