* goops/util.scm (filter): Removed. (Now supplied by core.)
* list.c, list.h (scm_filter, scm_filter_x): New functions.
* debugger/command-loop.scm: Prefix all commands imported from
(ice-9 debugger command-loop) with debugger:.
* boot-9.scm (resolve-interface): Process #:hide; Name custom interfaces
appropriately.
(module-use!, module-use-interfaces!): Remove existing interfaces
on the use-list based on module name rather than interface
identity so that custom interfaces truly replaces their previous
version.
