tool_urlglob: add named globs

[bagder]

Idea-by: Bastian Jesuiter

Verified by test 2408 - 2411

[bagder]

Blurgh, using <> in the command lines for the tests makes the XML-checker unhappy...

[vszakats]

Flaky Azure Ubuntu install failures should hopefully be gone after a rebase.

[Copilot]

Pull request overview

Adds support for named URL globs in the curl tool’s URL globbing parser, allowing glob components in a URL to be named and then referenced from --output using #<name>.

Changes:

• Extend tool_urlglob patterns with an optional name and parse <name> after { / [.
• Add output filename expansion support for #<name> references (in addition to #1, #2, ...).
• Add new test cases (2408/2409) and document the new syntax.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/tool_urlglob.h	Adds name field to URLPattern to store an optional glob name.
src/tool_urlglob.c	Parses <name> in URL globs, expands #<name> in output templates, and frees allocated names.
tests/data/test2408	New test for named {...} globs referenced by name in -o.
tests/data/test2409	New test for named [...] globs referenced by name in -o.
tests/data/Makefile.am	Registers the new tests in the test suite list.
docs/cmdline-opts/output.md	Documents named glob references in --output and provides examples.
docs/cmdline-opts/_GLOBBING.md	Documents named glob syntax in URLs and how output references work.

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[bagder]

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[augmentcode]

🤖 Augment PR Summary

Summary: This PR adds support for named URL glob parts, allowing users to reference specific glob components when generating output filenames.

Changes:

• Extends the URL glob pattern representation with an optional per-glob name field.
• Updates glob parsing to accept an optional <name> immediately after { or [, and rejects duplicate names.
• Adds a helper to look up patterns by name and reuses shared logic for printing detailed glob errors with caret positioning.
• Enhances output filename expansion to support named references (#<name>) in addition to numeric references (#1, #2, ...).
• Improves error reporting for output-glob expansion by printing the specific glob error and marking it as synthetic to avoid duplicate reporting.
• Adds new tests (2408�02411) covering named globs in URLs, named output references, duplicate-name rejection, and referencing an unknown name.
• Updates a few existing test expectations to match the adjusted error message wording (now �in position�).

Technical notes: Names are case-sensitive, length-limited, and are freed during glob cleanup; unknown named references produce a hard error.

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[augmentcode]

Review completed. 1 suggestion posted.

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 3 comments.

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