[csswg-drafts] [css-align] definition of 'flex-start' and 'flex-end' is wrong for '*-content'

dbaron has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-align] definition of 'flex-start' and 'flex-end' is wrong for '*-content' ==
The [definition of `flex-start`](https://drafts.csswg.org/css-align/#valdef-self-position-flex-start) and [of `flex-end`](https://drafts.csswg.org/css-align/#valdef-self-position-flex-end) currently say:

> 	When used on boxes that are not children of a flex container, this value behaves as start. 

While this is correct for `align-items`, `justify-items`, `align-self`, and `justify-self`, it is not correct for `align-content` and `justify-content`.  (See [flexbox's definition of `align-content`](https://drafts.csswg.org/css-flexbox-1/#propdef-align-content) and [flexbox's definition of `justify-content`](https://drafts.csswg.org/css-flexbox-1/#propdef-justify-content), both of which have "Applies to:" lines specifying flex *containers*, not flex *items*.)

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/1401 using your GitHub account