showoff: Migrate to by-name

-2
pkgs/servers/http/showoff/Gemfile pkgs/by-name/sh/showoff/Gemfile
pkgs/servers/http/showoff/Gemfile.lock pkgs/by-name/sh/showoff/Gemfile.lock
pkgs/servers/http/showoff/default.nix pkgs/by-name/sh/showoff/package.nix
pkgs/servers/http/showoff/gemset.nix pkgs/by-name/sh/showoff/gemset.nix
-2
pkgs/top-level/all-packages.nix
··· 10945 enableAirplay2 = true; 10946 }; 10947 10948 - showoff = callPackage ../servers/http/showoff { }; 10949 - 10950 stalwart-mail-webadmin = stalwart-mail.webadmin; 10951 10952 ruby-zoom = callPackage ../tools/text/ruby-zoom { };
··· 10945 enableAirplay2 = true; 10946 }; 10947 10948 stalwart-mail-webadmin = stalwart-mail.webadmin; 10949 10950 ruby-zoom = callPackage ../tools/text/ruby-zoom { };