support pinGlobalTxToPhysicalConnection setting.
improve error info
Merge pull request #385 from yunnysunny/master

版本库版本号更新
Merge branch 'master' of https://github.com/wenshao/druid
bug fixed for sql.json none id
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/wenshao/druid
Merge pull request #386 from pathfinder-name/branches/jta

support pinGlobalTxToPhysicalConnection setting.
deleted some code that not used.
corrected the menu's index in some page.
Merge branch 'master' of https://github.com/alibaba/druid