Select element border color

Created by: GaryJones

Textareas and input elements have a border colour of $inputBorder (default of #ccc), yet select elements are inconsistent, and have a hard-coded color of #bbb. https://github.com/twitter/bootstrap/blob/master/less/forms.less#L164

Assuming this inconsistency should be resolved, would the variable be better named as $fieldBorder or $fieldBorderColor, since the $inputBorder is currently applied to only a subset of input types, and textareas (and select elements).