add base support show tables
add field list support
refactor build result set
add show proxy for mixer
bufix: buildresultset
"show proxy config;" support
rename func String() to ConfigString()

rename func String() to ConfigString()
rename idleConns  to maxIdleConns
add connNum for db
config file refactor was done.

testing was pass.
format conf
Merge branch 'new_config_branches' into develop
refactor code
Merge branch 'develop'