copyright (cherry picked from commit e3d74bdd7faca1583cc4dbea56bbe04a44db9e47)
3916. [contrib] zone2sqlite checked wrong result code. Address compiler warnings. [RT #36931]
3164. [func] Enable DLZ modules to retrieve client information, so that responses can be changed depending on the source address of the query. [RT #25768]
2155. [contrib] SQLite sdb module from jaboydjr@netwalk.com. [RT #16694]