tests: fix callback signatures to please UndefinedBehaviorSanitizer

Make test applications use the correct prototypes for callbacks.

Closes #15289

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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tests: increase lib571 timeout from 3s to 30s

- 3s is too short for our CI, making this test fail occasionally
- test usually experiences no delay run locally, so 30s wont hurt

tests: increase lib571 timeout from 3s to 30s

- 3s is too short for our CI, making this test fail occasionally
- test usually experiences no delay run locally, so 30s wont hurt

Closes #12013

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libtest: use curl_free() to free libcurl allocated data

In several test programs. These mistakes are not detected or a problem
as long as memdebug.h is included, as that provides the deb

libtest: use curl_free() to free libcurl allocated data

In several test programs. These mistakes are not detected or a problem
as long as memdebug.h is included, as that provides the debug wrappers
for all memory functions in the same style libcurl internals do it,
which makes curl_free and free effectively the same call.

Reported-by: Nicholas Nethercote
Closes #11746

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rtsp: skip malformed RTSP interleaved frame data

Some IP cameras send malformed RTSP interleaved frames sometimes, which
can cause curl_easy_perform return 1 (CURLE_UNSUPPORTED_PROTOCOL)

rtsp: skip malformed RTSP interleaved frame data

Some IP cameras send malformed RTSP interleaved frames sometimes, which
can cause curl_easy_perform return 1 (CURLE_UNSUPPORTED_PROTOCOL). This
change attempts to skip clearly incorrect RTSP interleaving frame data.

Closes #10808

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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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tidy-up: make conditional checks more consistent

... remove '== NULL' and '!= 0'

Closes #6912

copyright: fix year ranges

Follow-up from 4d2f8006777

curl.se: new home

Closes #6172

copyrights: update all copyright notices to 2019 on files changed this year

Closes #4547

build: fix Codacy warnings

Reduce variable scopes and remove redundant variable stores.

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

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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code style: use spaces around pluses

code style: use spaces around equals signs

libtest: fix int-in-bool-context warnings

GCC 7 complained:
‘*’ in boolean context, suggest ‘&&’ instead [-Wint-in-bool-context]

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: move open braces to comply with function declaration style

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://

Bug #149: Deletion of unnecessary checks before calls of the function "free"

The function "free" is documented in the way that no action shall occur for
a passed null pointer. It is ther

Bug #149: Deletion of unnecessary checks before calls of the function "free"

The function "free" is documented in the way that no action shall occur for
a passed null pointer. It is therefore not needed that a function caller
repeats a corresponding check.
http://stackoverflow.com/questions/18775608/free-a-null-pointer-anyway-or-check-first

This issue was fixed by using the software Coccinelle 1.0.0-rc24.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>

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libtest: fixed linker errors on msvc

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

libtest: fix data type of some *_setopt() 'long' arguments

Revert changes relative to lib/*.[ch] recent renaming

This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:

f871de0... build: make use

Revert changes relative to lib/*.[ch] recent renaming

This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:

f871de0... build: make use of 76 lib/*.h renamed files
ffd8e12... build: rename 76 lib/*.h files

This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:

c087374... curl_setup.h: remove redundant include guard

This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:

13606bb... build: make use of 93 lib/*.c renamed files
5b6e792... build: rename 93 lib/*.c files
7d83dff... build: commit 13606bbfde follow-up 1

Start of related discussion thread:

http://curl.haxx.se/mail/lib-2013-01/0012.html

Asking for confirmation on pushing this revertion commit:

http://curl.haxx.se/mail/lib-2013-01/0048.html

Confirmation summary:

http://curl.haxx.se/mail/lib-2013-01/0079.html

NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.

lib/curl_imap.h
lib/curl_smtp.h

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