Fixes issue #11122 -- navbar-fixed-bottom border

Enable border-top in .navbar-fixed-bottom
Fixes #10522: Enable use of form validation class on .radio, .checkbox, .radio-inline, and .checkbox-inline
Merge branch 'master' of https://github.com/jeonghwan-kim/bootstrap into jeonghwan-kim-master

Conflicts:
	dist/css/bootstrap.min.css