tests: make the unit test result type `CURLcode`

Before this patch, the result code was a mixture of `int` and
`CURLcode`.

Also adjust casts and fix a couple of minor issues fou

tests: make the unit test result type `CURLcode`

Before this patch, the result code was a mixture of `int` and
`CURLcode`.

Also adjust casts and fix a couple of minor issues found along the way.

Cherry-picked from #13489
Closes #13600

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misc: fix typos

Closes #13344

tests: fix lib tests to run with a dynamic log directory

Ref: #10818

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- save

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- saves us from pointless churn
- git keeps history for us
- the year range is kept in COPYING

checksrc is updated to allow non-year using copyright statements

Closes #10205

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style: use space after comment start and before comment end

/* like this */

/*not this*/

checksrc is updated accordingly

Closes #9828

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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copyright: fix year ranges

Follow-up from 4d2f8006777

curl.se: new home

Closes #6172

cookies: using a share with cookies shouldn't enable the cookie engine

The 'share object' only sets the storage area for cookies. The "cookie
engine" still needs to be enabled or activat

cookies: using a share with cookies shouldn't enable the cookie engine

The 'share object' only sets the storage area for cookies. The "cookie
engine" still needs to be enabled or activated using the normal cookie
options.

This caused the curl command line tool to accidentally use cookies
without having been told to, since curl switched to using shared cookies
in 7.66.0.

Test 1166 verifies

Updated test 506

Fixes #4429
Closes #4434

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whitespace fixes

- replace tabs with spaces where possible
- remove line ending spaces
- remove double/triple newlines at EOF
- fix a non-UTF-8 character
- cleanup a few inde

whitespace fixes

- replace tabs with spaces where possible
- remove line ending spaces
- remove double/triple newlines at EOF
- fix a non-UTF-8 character
- cleanup a few indentations/line continuations
in manual examples

Closes https://github.com/curl/curl/pull/3037

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cppcheck: fix warnings

- Get rid of variable that was generating false positive warning
(unitialized)

- Fix issues in tests

- Reduce scope of several variables all over

cppcheck: fix warnings

- Get rid of variable that was generating false positive warning
(unitialized)

- Fix issues in tests

- Reduce scope of several variables all over

etc

Closes #2631

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code style: use spaces around equals signs

tests: fix -Wcast-qual warnings

Avoid casting string literals to non-const char *.

lib506: fix build for Open Watcom

Rename symbol lock to locks to not clash with OW CRTL function name.

Closes #1196

checksrc: warn for assignments within if() expressions

... they're already frowned upon in our source code style guide, this
now enforces the rule harder.

checksrc: stricter no-space-before-paren enforcement

In order to make the code style more uniform everywhere

code: style updates

tests/libtest: follow our code style guidelines better

... checksrc of all test code is pending.

URLs: change all http:// URLs to https://

libtest: fixed linker errors on msvc

Bug: https://github.com/bagder/curl/pull/144

cookies: Improved OOM handling in cookies

This fixes the test 506 torture test. The internal cookie API really
ought to be improved to separate cookie parsing errors (which may be
ig

cookies: Improved OOM handling in cookies

This fixes the test 506 torture test. The internal cookie API really
ought to be improved to separate cookie parsing errors (which may be
ignored) with OOM errors (which should be fatal).

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test506: Fixed a couple of memory leaks in test

CURLOPT_COOKIELIST: Added "RELOAD" command

test506: verify aa6884845168

After the fixed cookie lock deadlock, this test now passes and it
detects double-locking and double-unlocking of mutexes.

lib506.c: Fixed possible use of uninitialized variables