tidy-up: one comment and EOF newlines

Reviewed-by: Daniel Stenberg
Closes #13108

mbedtls: properly cleanup the thread-shared entropy

- Store the state of the thread-shared entropy for global init/cleanup.

- Use curl's thread support of mbedtls for all Windows bu

mbedtls: properly cleanup the thread-shared entropy

- Store the state of the thread-shared entropy for global init/cleanup.

- Use curl's thread support of mbedtls for all Windows builds instead of
just when the threaded resolver is used via USE_THREADS_WIN32.

Prior to this change on global cleanup curl builds that have curl thread
support for mbedtls freed the entropy (8b1d2298) but failed to mark that
it had been freed, which caused problems on subsequent init + transfer.

Bug: https://github.com/curl/curl/discussions/11919#discussioncomment-8687105
Reported-by: awesomekosm@users.noreply.github.com

Closes https://github.com/curl/curl/pull/13071

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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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tidy-up: process.h detection and use

This patch aims to cleanup the use of `process.h` header and the macro
`HAVE_PROCESS_H` associated with it.

- `process.h` is always availabl

tidy-up: process.h detection and use

This patch aims to cleanup the use of `process.h` header and the macro
`HAVE_PROCESS_H` associated with it.

- `process.h` is always available on Windows. In curl, it is required
only for `_beginthreadex()` in `lib/curl_threads.c`.

- `process.h` is also available in MS-DOS. In curl, its only use was in
`lib/smb.c` for `getpid()`. But `getpid()` is in fact declared by
`unistd.h`, which is always enabled via `lib/config-dos.h`. So the
header is not necessary.

- `HAVE_PROCESS_H` was detected by CMake, forced to 1 on Windows and
left to real detection for other platforms.
It was also set to always-on in `lib/config-win32.h` and
`lib/config-dos.h`.
In autotools builds, there was no detection and the macro was never
set.

Based on these observations, in this patch we:

- Rework Windows `getpid` logic in `lib/smb.c` to always use the
equivalent direct Win32 API function `GetCurrentProcessId()`, as we
already did for Windows UWP apps. This makes `process.h` unnecessary
here on Windows.

- Stop #including `process.h` into files where it was not necessary.
This is everywhere, except `lib/curl_threads.c`.

> Strangely enough, `lib/curl_threads.c` compiled fine with autotools
> because `process.h` is also indirecty included via `unistd.h`. This
> might have been broken in autotools MSVC builds, where the latter
> header is missing.

- Delete all remaining `HAVE_PROCESS_H` feature guards, for they were
unnecessary.

- Delete `HAVE_PROCESS_H` detection from CMake and predefined values
from `lib/config-*.h` headers.

Reviewed-by: Jay Satiro
Closes #9703

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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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curl.se: new home

Closes #6172

polarssl: removed

As detailed in DEPRECATE.md, the polarssl support is now removed after
having been disabled for 6 months and nobody has missed it.

The threadlock files used by

polarssl: removed

As detailed in DEPRECATE.md, the polarssl support is now removed after
having been disabled for 6 months and nobody has missed it.

The threadlock files used by mbedtls are renamed to an 'mbedtls' prefix
instead of the former 'polarssl' and the common functions that
previously were shared between mbedtls and polarssl and contained the
name 'polarssl' have now all been renamed to instead say 'mbedtls'.

Closes #4825

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