Fix function-name typos. Callers don't have the typos.
Cleanup comments-typos,trim trailing whitespaces.
Correct more cases of addresse (no "s"), & in entity file
Correct cases of __Prefixe() (no "s"),in cust entity files
Merge pull request #41 from rowanthorpe/typos-ip-addresse_s_

Typos in functions {add,remove}IPv{4,6}addresse*s*