Better URL handling

[GlazerMann]

Add a bunch more types of URLs to look at.

More importantly, if there is both a url and a chapter-url, then we prefer the chapter one, and we do not delete either one of them when we are done.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@3b36d26). Click here to learn what that means.
The diff coverage is 36.36%.

@@            Coverage Diff            @@
##             master    #1206   +/-   ##
=========================================
  Coverage          ?   79.23%           
  Complexity        ?     1847           
=========================================
  Files             ?       11           
  Lines             ?     3815           
  Branches          ?        0           
=========================================
  Hits              ?     3023           
  Misses            ?      792           
  Partials          ?        0

Impacted Files	Coverage Δ	Complexity Δ
Template.php	80.63% <36.36%> (ø)	1738 <0> (?)

---

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@3b36d26). Click here to learn what that means.
The diff coverage is 30.76%.

@@            Coverage Diff            @@
##             master    #1206   +/-   ##
=========================================
  Coverage          ?   79.13%           
  Complexity        ?     1847           
=========================================
  Files             ?       11           
  Lines             ?     3819           
  Branches          ?        0           
=========================================
  Hits              ?     3022           
  Misses            ?      797           
  Partials          ?        0

Impacted Files	Coverage Δ	Complexity Δ
Template.php	80.5% <30.76%> (ø)	1738 <0> (?)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3b36d26...05ab4d9. Read the comment docs.