gen.pl: insert the current date and version in generated man page

[bagder]

Reported-by: Gisle Vanem
Ref: #7780

[gvanem]

Almost, but with my Strawberry Perl, this generates:

curl 7.80.0                        1b 1e 1Y                            curl(1)

With Cygwin's Perl, it's fine; Sep 28 2021.

[gvanem]

Update: My Strawberry Perl doesn't like the %e. But a %d works. Giving sep 28 2021 (lower-case month name).

[bagder]

It of course begs the question if your perl install isn't broken and if we should really care about broken perl installs. I found no records of %e not working in perl generally.

But I also checked a few other man pages and the date format used vary greatly. I don't think using a zero-prefixed number (%d instead of %e) would hurt. Maybe even use the full month name.

What do you think about "%B %d %Y" ?

[jay]

It of course begs the question if your perl install isn't broken

It's not. strawberry perl posix seems to be using the C runtime's strftime and older MS CRTs likely do not support %e. I tried "%b %e %Y" in Windows 7 with a recent strawberry perl and I get a blank string.

What do you think about "%B %d %Y" ?

That works here and all the format specifiers are C89.

[gvanem]

What do you think about "%B %d %Y" ?

Work fine.

[bagder]

I'll do a PR with that change as soon as we get the winsock situation in master stable again