In #2761 I introduced a new API, struct Mailbox *ctx_mailbox(struct Context* ctx), which has the sole purpose to avoid boilerplate like if (Context && Context->mailbox).

I would like to use the API more extensively, whenever Context->mailbox is used. This needs to be done with care as Context is a global variable and its contents might change when calling other functions.

This would

General informations

• system/distribution (with version): Debian Buster
• offlineimap version (offlineimap -V): offlineimap v7.2.3
• Python version: v2.7.16
• server name or domain: Amazon WorkMail
• CLI options: nothing special

Configuration file offlineimaprc

[Repository WorkMail-Remote]
type = IMAP
remotehost = imap.mail.eu-west-1.awsapps.com
remoteuser = REDAC

I've set up alot to use notmuch address as the abook entry following the docs:

command = 'notmuch address --format=json --output=recipients date:1Y..'
regexp = '\[?{"name": "(?P<name>.*)", "address": "(?P<email>.+)", "name-addr": ".*"}[,\]]?'
shellcommand_external_filtering = False
ignorecase = True

When I 'search' by typing a partial name and hitting tab, it seems to be case-