Configure, perlbug: Fall back to git user.email

[danielzgtg]

Modern Linux installations, especially those at home, do not set domainname. I have "(none)". But most programmers use Git, so will have their email set there. Improving these defaults is convenient, as I have already mistyped my email in perlbug once.

Before

What is your e-mail address? [home@daniel-desktop3.(none)] 

After

What is your e-mail address? [[email protected]] 

---

• This set of changes does not require a perldelta entry.

[jkeenan]

I configured on blead, then on this branch rebased on blead, to see what the differences in config.sh would be.

$ diff --ignore-matching-lines='Configuration time:' ../perl/config.sh ./config.sh
71,72c71,72
< cf_email='jkeenan@jk-bookworm.(none)'
< cf_time='Sun Mar 22 12:14:42 UTC 2026'
---
> cf_email='[email protected]'
> cf_time='Sun Mar 22 12:21:27 UTC 2026'
1005c1005
< perladmin='jkeenan@jk-bookworm.(none)'
---
> perladmin='[email protected]'

[Leont]

Had this been tested on a system without git? (I suspect all of our CI environments would have it).

[danielzgtg]

I tested with both git invocations replaced with gitttt to simulate the command being missing, and got the previous behavior