[C++] Detect system uriparser by default

[asfimport]

We can use uriparser 0.9.2 or later.

Reporter: Kouhei Sutou / @kou
Assignee: Kouhei Sutou / @kou

Related issues:

• [C++] Add uriparser to conda-forge (relates to)

PRs and other links:

• GitHub Pull Request #4525

_{Note: This issue was originally created as ARROW-5370. Please see the migration documentation for further details.}

[asfimport]

Kouhei Sutou / @kou:
Issue resolved by pull request 4525
#4525