Convert LWP::Simple to http_download function calls

[virtualmin]

The dependency on LWP::Simple is causing some folks problems; if it's missing the page indefinitely hangs with the spinner.

There is no need for an external dependency for making simple web requests, as the Webmin library already has a relatively simple function for downloading a remote file.

http://doxfer.webmin.com/Webmin/API_Webmin-Core#http_download.28host.2C_port.2C_page.2C_destfile.2C_.5B.26error.5D.2C_.5B.26callback.5D.2C_.5Bsslmode.5D.2C_.5Buser.2C_pass.5D.2C_.5Btimeout.5D.2C_.5Bosdn-convert.5D.2C_.5Bno-cache.5D.2C_.5B.26headers.5D.29

I see only three instances of this library being needed, all in sysinfo.cgi. You can also kill a couple of lines of code by using the Webmin function (normally using popular CPAN libraries is good Perl practice, but Webmin has a very strong desire to require as few external dependencies as possible, especially for functionality that already exists in the standard Webmin library).

[iliajie]

Alright, Joe. All dependencies are going to _be removed_ in version 10.30. Theme will only wish for Net::SSLeay to make updates work (as they only can be access by https connection made to GitHub) but theme will never fail with error message again. Webmin also requires Net::SSLeay to establish https connections by the way, so it should be installed anyway.

[jcameron]

Regarding updates, does the theme have the ability to download updates to itself separately from Webmin's regular update process?

[iliajie]

No, theme when update is ready shows the notice and if user clicks update it will update itself by Webmin means, meaning Webmin->Webmin Configuration->Themes.

[iliajie]

On the local version, change version number in VERSION.txt to see how it works. If you disable the spinner you will see what is happening. After update is clicked by a user, JavaScrit inserts a link to Theme module, and clicks download and install. New version, 10.30, will have an option to disable notification updates completely.

I understand your concern.

[rvanlaak]

Would it be possible to force an update? We do not have Net::SSLeay installed, so that means updates do not work at the moment.

[iliajie]

You can always update manually. You need SSL simply because you can't make non https request to GitHub. For the future, automatic updates will not work at all (without Net::SSLeay), just as much you will not be able to access Webmin using https without this Perl module. There is not a single reason not to have it installed, right? Can you install it?

[rvanlaak]

After installing Net::SSLeay the updates still do not work. Any place where I can debug it? A 'force update' link / url would be nice :+1:

[iliajie]

What version you're on?

[iliajie]

I mean theme version?

[iliajie]

Try refreshing System Information.

[rvanlaak]

Theme version is Authentic Theme 10.1.2

[iliajie]

You need more dependencies for this version. Version 11 is out and it's only needs Net::SSLeay. Update manually this time.