test1608: make it build and get skipped without shuffle DNS support

unit tests: use the unit test infrastructure better

Allow UNITTEST_STOP to return the error code, use the fail & abort
macros to indicate test failure and return success instead of fail

unit tests: use the unit test infrastructure better

Allow UNITTEST_STOP to return the error code, use the fail & abort
macros to indicate test failure and return success instead of fail if
the unit test can't test anything because of missing features at
compile-time. A couple of tests could never fail because they were
overriding the failure return code.

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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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lib/unit tests: add missing curl_global_cleanup() calls

curl.se: new home

Closes #6172

source cleanup: remove all custom typedef structs

- Stick to a single unified way to use structs
- Make checksrc complain on 'typedef struct {'
- Allow them in tests, public heade

source cleanup: remove all custom typedef structs

- Stick to a single unified way to use structs
- Make checksrc complain on 'typedef struct {'
- Allow them in tests, public headers and examples

- Let MD4_CTX, MD5_CTX, and SHA256_CTX typedefs remain as they actually
typedef different types/structs depending on build conditions.

Closes #5338

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checksrc: enhance the ASTERISKSPACE and update code accordingly

Fine: "struct hello *world"

Not fine: "struct hello* world" (and variations)

Closes #5386

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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cleanup: make local functions static

urlapi: turn three local-only functions into statics

conncache: make conncache_find_first_connection static

multi: make detach_connnect

cleanup: make local functions static

urlapi: turn three local-only functions into statics

conncache: make conncache_find_first_connection static

multi: make detach_connnection static

connect: make getaddressinfo static

curl_ntlm_core: make hmac_md5 static

http2: make two functions static

http: make http_setup_conn static

connect: make tcpnodelay static

tests: make UNITTEST a thing to mark functions with, so they can be static for
normal builds and non-static for unit test builds

... and mark Curl_shuffle_addr accordingly.

url: make up_free static

setopt: make vsetopt static

curl_endian: make write32_le static

rtsp: make rtsp_connisdead static

warnless: remove unused functions

memdebug: remove one unused function, made another static

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resolve: add CURLOPT_DNS_SHUFFLE_ADDRESSES

This patch adds CURLOPT_DNS_SHUFFLE_ADDRESSES to explicitly request
shuffling of IP addresses returned for a hostname when there is more
th

resolve: add CURLOPT_DNS_SHUFFLE_ADDRESSES

This patch adds CURLOPT_DNS_SHUFFLE_ADDRESSES to explicitly request
shuffling of IP addresses returned for a hostname when there is more
than one. This is useful when the application knows that a round robin
approach is appropriate and is willing to accept the consequences of
potentially discarding some preference order returned by the system's
implementation.

Closes #1694

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