[bug#47435] gnu: mail: Make the sendmail package actually output its binary

[Rovanion Luckey]

> We can see helpfile and statistics file go into etc/mail, then sendmailgoes into sbin, smrsh is missing in sbin.

 

Fixed.

In addition to Léo Le Bouter's comments, I suggest either omitting or
amending this part. A Maildir is where the user's emails will be kept,
but it cannot be stored in the build output, because that directory will
be immutable after the build is complete.

 >

What is the default?

`/etc/mail` is the default it seems. I modified the patch to use `$out/var/spool/mail` instead. `/var/spool/mail` is where I would like to put it on a conventional linux distribution. But I don't know if MAILDIR means "where the user's mail will be kept" in this context because when I do that I end up with the following file tree:

$ tree /gnu/store/05wxmp6m3pfg5d2jrwbx4rx5p3nxyyvc-sendmail-8.15.2
/gnu/store/05wxmp6m3pfg5d2jrwbx4rx5p3nxyyvc-sendmail-8.15.2
├── bin
│   ├── hoststat -> /gnu/store/05wxmp6m3pfg5d2jrwbx4rx5p3nxyyvc-sendmail-8.15.2/sbin/sendmail
│   ├── mailq -> /gnu/store/05wxmp6m3pfg5d2jrwbx4rx5p3nxyyvc-sendmail-8.15.2/sbin/sendmail
│   ├── newaliases -> /gnu/store/05wxmp6m3pfg5d2jrwbx4rx5p3nxyyvc-sendmail-8.15.2/sbin/sendmail
│   ├── purgestat -> /gnu/store/05wxmp6m3pfg5d2jrwbx4rx5p3nxyyvc-sendmail-8.15.2/sbin/sendmail
│   └── vacation
├── etc
│   └── mail
│       ├── helpfile
│       └── statistics
├── libexec
│   └── smrsh
├── sbin
│   ├── editmap
│   ├── mailstats
│   ├── makemap
│   ├── praliases
│   └── sendmail
├── share
│   └── doc
│       └── sendmail-8.15.2
│           └── LICENSE
└── var
    └── spool
        └── mail
            ├── sendmail.cf
            └── submit.cf

with config files for sendmail in `$out/var/spool/mail`.

0001-gnu-sendmail-Fix-output-s-directory-structure.patch
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