Relative `Home Page URL`s and `Article URL`s are not presented correctly.

[vruyr]

When a feed has URLs relative, NetNewsWire Version 6.1 (6106) doesn't make them absolute by combining with the Feed URL, instead leaves them relative.

Example:

• Feed URL: https://www.qemu.org/feed.xml
• Home Page reference:

  <link href="/" rel="alternate" type="text/html" />

• Article reference:

  <entry>
  <title type="html">QEMU version 7.0.0 released</title>
  <link href="/2022/04/19/qemu-7-0-0/" rel="alternate" type="text/html" title="QEMU version 7.0.0 released" />

• Presented Home Page URL: http:///
• Presented Article URL: /2022/04/19/qemu-7-0-0/

[kconner]

Another example: https://neverworkintheory.org/atom.xml

This feed's latest article is named "That Went Well". Tapping its headline text takes no action. The URL from the Share toolbar button, then Copy, is: /2022/04/30/that-went-well.html

The first link in the article is "first online event". Tapping the link also takes no action.

[karlcow]

Another site which is broken because of this. https://tess.oconnor.cx/feed