Adjustment to Sewer related Perks

[granny]

As Lower has became a flooded area somewhat akin to a big sewer, and as we haven't had have many sewer areas and they're currently deeply shrinked, I think that the Optional Perks and Backgrounds that used to take effect on the sewers should have their bonuses expanded to all Lower Sanctuary area.

They're the following:

• Ooze Savant
• Sewer Dweller
• Ranger FA enemy Vermin

[Talir]

Was done in an earlier update.