configure: do not echo most inherited `LDFLAGS` to config files

`libcurl.pc` `Libs.private` (since 8.11.0, and in `Libs` before 7.20.0)
and `curl-config` `--static-libs` (since 7.17.1, a

configure: do not echo most inherited `LDFLAGS` to config files

`libcurl.pc` `Libs.private` (since 8.11.0, and in `Libs` before 7.20.0)
and `curl-config` `--static-libs` (since 7.17.1, and in `Libs` between
7.7.2-7.25.0). This included all flags inherited from the environment,
in addition to those coming from dependency detections.

To avoid spilling all linker flags inherited from the environment to
the libcurl config files, this patch omits them all, except `-L`, `-F`,
`--library-path=` and `-framework` options, which are still passed.
The rationale for the exceptions is that `LIBS` is passed as-is, and
`LDFLAGS`, `LIBS` are the canonical way to pass custom libs options
to a build. `LIBS` may not work without a matching custom libpath.

This brings autotools behaviour closer to cmake, and `curl-config`
closer to `libcurl.pc`.

Follow-up to 9f56bb608ecfbb8978c6cb72a04d9e8b23162d82 #14681
Follow-up to 4c8adc8fee5e55754da3d8f8d982733a7bf3dece
Reported-by: Peter Marko
Fixes #15533
Closes #15550

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cmake, configure: also link with CoreServices

When linking with CoreFoundation, also link with CoreServices which is
apparently required to avoid an NSInvalidArgumentException in softwar

cmake, configure: also link with CoreServices

When linking with CoreFoundation, also link with CoreServices which is
apparently required to avoid an NSInvalidArgumentException in software
linking with libcurl on macOS Sonoma 14 and later.

Fixes #11893
Closes #11894

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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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configure: split out each TLS library detector into its own function

... and put those functions in separate m4 files per TLS library.