Rogue Mechanic: Any invis on a rogue should function as invis & invis vs undead

[Vsai]

Date of Era Evidence:
January 20, 2000 Patch Notes.

Era Extract:
*Rogue Enhancement*
Whenever a rogue is invisible, whether by spell, potion, or skill, they are now
also invisible to undead.
This change was made to add a definite class-advantage to the rogue, allowing
them to do something that no other class could do. It is the first step in a
multi-step process to improve the rogue class.

Era Source:
https://groups.google.com/forum/?hl=...st/FPJmfQtRXZY

Issue:
Listed functionality is not present on P99.

Correction:
Add the functionality as described.

(Posting the following to confirm this was in game well past the projects timeline)

Later Era Extract:
"A rogue with either Invis or IVU on him counts as having both." -ShadowCross Safehouse Administrator (July 01 2004)

Later Era Source:
https://thesafehouse.org/forums/foru...045#post234045