protocol.h: fix the CURLPROTO_MASK

[bagder]

It had an 'f' too few

Follow-up to cd5ca80

Spotted by Codex Security

Test case 3219 added to catch this next time.

[Copilot]

Pull request overview

Fixes an incorrect CURLPROTO_MASK value in lib/protocol.h (missing one hex f) and adds a unit test to prevent regressions, as a follow-up to the earlier change referenced in the PR description.

Changes:

• Correct CURLPROTO_MASK from 0x3ffffff to 0x3fffffff to include all public protocol bits up to CURLPROTO_GOPHERS (bit 29).
• Add unit test unit3219 plus the corresponding test spec test3219.
• Wire the new test into the unit and data test makefiles.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
lib/protocol.h	Fixes the protocol bitmask to include all intended public protocol bits.
tests/unit/unit3219.c	Adds assertions validating mask inclusion/exclusion for key protocol bits.
tests/unit/Makefile.inc	Registers the new unit test source in the unit test bundle.
tests/data/test3219	Adds the test case definition for the new unit test.
tests/data/Makefile.am	Includes test3219 in the autotools test case list.

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[bagder]

For the record, I think this is overzealous:

tests/unit/unit1627.c: line 89: '}' preceded by empty line