Fix remove admin
Fix ipv6
Add student active
Merge master
Merge branch 'master' of github.com:anhlt/elearning into minh
Fix verify
Merge branch 'master' of github.com:anhlt/elearning into minh
Fix verify
Merge branch 'master' of github.com:anhlt/elearning into minh
add file extensions
Merge branch 'master' of github.com:anhlt/elearning into minh
admin edit admin, lecturer, student information