Auto merge of #6645 - bundler:colby/require-etc, r=colby-swandale
Auto merge of #6645 - bundler:colby/require-etc, r=colby-swandale

require `etc` in Bundler#user_home

### What was the end-user problem that led to this PR?

In some cases, we are sending messages to the`Etc` library which may not be loaded.

### What was your diagnosis of the problem?

See #6640

### What is your fix for the problem, implemented in this PR?

Require the `etc` library before we use it

Fixes #6640

(cherry picked from commit 5dcfc318f2f58d81875880533a65c8b58cda5622)

mvz/bundler,dilumnavanjana/bundler,mvz/bundler,bundler/bundler,dilumnavanjana/bundler,bundler/bundler