add connection pool
fix connection prob
modify raise logic
Merge branch 'master' into ph7_dev2
try to mod con_ool
enable handling connection error
adjust just_booting
remove unnesessary comment
Merge branch 'ph7_dev2' into ph7_review
undertook to dev mklhash
mod something
add mklhash
add error.css
Merge branch 'ph7_dev2' into ph7_review
change value name
Merge branch 'ph7_dev2' into ph7_review
modify some points
Merge branch 'ph7_dev2' into ph7_review
almost finish phase7