Handle DomainSettings packets received from domain server.

[ctrlaltdavid]

• The avatar min and max height values are needed for avatar scale limiting: see MyAvatar.restrictScaleFromDomainSettings(...) which sets AvatarData's _domainMinimumHeight and _domainMaximumHeight member values with values received from the domain server. ... Also check MyAvatar.clearScaleRestriction() as part of this.