Slight update to PvP rules

[*Mr_Otyugh]

1.3) Player versus Player (PvP)
   - Consent required for PvP, if consent is not given, the decliner need to move elsewhere and cease whatever antagonistic activity was taking place if any. (Insults, threats, etc)

The portion of the rule is marked in italics. Thanks for Danakir for noting about this good and simple change.