ST_Equals documentation does not describe current behavior

[dbaston]

The docs for ST_Equals state that:

This function will return false if either geometry is invalid even if they are binary equal.

However, this behavior was broken with #3223 (released in 2.2). Either the work done under that ticket should be reverted, or the documentation should be updated with the new behavior.

[strk]

I think behavior on invalid geometries is generally undefined, so would fix the documentation accordingly. But I'll leave the final word to Regina the docs queen

[robe]

In 15249:

ST_Equals documentation does not describe current behavior
closes #3566 for 2.4.0 (trunk)

[robe]

In 15250:

ST_Equals documentation does not describe current behavior
closes #3566 for 2.3.1

[robe]

In 15251:

ST_Equals documentation does not describe current behavior
closes #3566 for 2.2.4