userHasAccessToComment
Description
Verifies if a comment is visible for an user.
Parameters
Return Type
Boolean
A "true" return value means that the user can see the comment.
Example
userHasAccessToComment("admin","10000");
Returns "true" if the user "admin" can see the comment with id "10000" and "false" if the user cannot see the comment.
The look-up is first made after the userkey, then after the username.