32819: Update for axi-cache completion

Add some subcommands and to disable file name completion
for the subcommands info and help.

Initially submitted to Debian at https://bugs.debian.org/729921
32818: gzip completion: --rsyncable option is missing

Debian's gzip version has a --rsyncable option (see "gzip --help"
output, the man page not being currently up to date). It should be
supported by "/usr/share/zsh/functions/Completion/Unix/_gzip".

Initially submitted to Debian at https://bugs.debian.org/702000
32815: aptitude completion missing resolver options

Expand aptitude completion by two boolean options

Initially submitted to Debian at https://bugs.debian.org/702760
32814: Add some more recent dpkg options

Expands dpkg completion by adding the --add-architecture,
--remove-architecture, and --print-foreign-architectures options.

Initially submitted to Debian at
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681518#13