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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checksrc: disallow spaces before labels

Out of 415 labels throughout the code base, 86 of those labels were
not at the start of the line. Which means labels always at the start of
th

checksrc: disallow spaces before labels

Out of 415 labels throughout the code base, 86 of those labels were
not at the start of the line. Which means labels always at the start of
the line is the favoured style overall with 329 instances.

Out of the 86 labels not at the start of the line:
* 75 were indented with the same indentation level of the following line
* 8 were indented with exactly one space
* 2 were indented with one fewer indentation level then the following
line
* 1 was indented with the indentation level of the following line minus
three space (probably unintentional)

Co-Authored-By: Viktor Szakats

Closes #11134

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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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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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misc: update copyright year ranges

timediff.[ch]: add curlx helper functions for timeval conversions

Also move timediff_t definitions from timeval.h to timediff.h and
then make timeval.h include the new standalone-capable

timediff.[ch]: add curlx helper functions for timeval conversions

Also move timediff_t definitions from timeval.h to timediff.h and
then make timeval.h include the new standalone-capable timediff.h.

Reviewed-by: Jay Satiro
Reviewed-by: Daniel Stenberg

Supersedes #5888
Closes #8595

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lib/unit tests: add missing curl_global_cleanup() calls

copyright: fix year ranges

Follow-up from 4d2f8006777

curl.se: new home

Closes #6172

build: fix Codacy warnings

Reduce variable scopes and remove redundant variable stores.

Closes https://github.com/curl/curl/pull/3975

tests: Run global cleanup at end of tests

Make sure to run curl_global_cleanup() when shutting down the test
suite to release any resources allocated in the SSL setup. This is
clearl

tests: Run global cleanup at end of tests

Make sure to run curl_global_cleanup() when shutting down the test
suite to release any resources allocated in the SSL setup. This is
clearly visible when running tests with PolarSSL where the thread
lock calloc() memory which isn't released when not running cleanup.
Below is an excerpt from the autobuild logs:

==12368== 96 bytes in 1 blocks are possibly lost in loss record 1 of 2
==12368== at 0x4837B65: calloc (vg_replace_malloc.c:752)
==12368== by 0x11A76E: curl_dbg_calloc (memdebug.c:205)
==12368== by 0x145CDF: Curl_polarsslthreadlock_thread_setup
(polarssl_threadlock.c:54)
==12368== by 0x145B37: Curl_polarssl_init (polarssl.c:865)
==12368== by 0x14129D: Curl_ssl_init (vtls.c:171)
==12368== by 0x118B4C: global_init (easy.c:158)
==12368== by 0x118BF5: curl_global_init (easy.c:221)
==12368== by 0x118D0B: curl_easy_init (easy.c:299)
==12368== by 0x114E96: test (lib1906.c:32)
==12368== by 0x115495: main (first.c:174)

Closes #3783
Reviewed-by: Marcel Raad <Marcel.Raad@teamviewer.com>
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

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tests: fix multiple may be used uninitialized warnings

cookies: only save the cookie file if the engine is enabled

Follow-up to 8eddb8f4259.

If the cookieinfo pointer is NULL there really is nothing to save.

Without this fix, w

cookies: only save the cookie file if the engine is enabled

Follow-up to 8eddb8f4259.

If the cookieinfo pointer is NULL there really is nothing to save.

Without this fix, we got a problem when a handle was using shared object
with cookies and is told to "FLUSH" it to file (which worked) and then
the share object was removed and when the easy handle was closed just
afterwards it has no cookieinfo and no cookies so it decided to save an
empty jar (overwriting the file just flushed).

Test 1905 now verifies that this works.

Assisted-by: Michael Wallner
Assisted-by: Marcel Raad

Closes #3621

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