misc: Fix typos in docs and lib

This fixes miscellaneous typos and duplicated words in the docs, lib
and test comments and a few user facing errorstrings.

Author: RainRat on Git

misc: Fix typos in docs and lib

This fixes miscellaneous typos and duplicated words in the docs, lib
and test comments and a few user facing errorstrings.

Author: RainRat on Github
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Dan Fandrich <dan@coneharvesters.com>
Closes: #13019

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build: delete `HAVE_STDINT_H` and `HAVE_INTTYPES_H`

We use `stdint.h` unconditionally in all places except one. These uses
are imposed by external dependencies / features. nghttp2, quic,

build: delete `HAVE_STDINT_H` and `HAVE_INTTYPES_H`

We use `stdint.h` unconditionally in all places except one. These uses
are imposed by external dependencies / features. nghttp2, quic, wolfSSL
and `HAVE_MACH_ABSOLUTE_TIME` do require this C99 header. It means that
any of these features make curl require a C99 compiler. (In case of
MSVC, this means Visual Studio 2010 or newer.)

This patch changes the single use of `stdint.h` guarded by
`HAVE_STDINT_H` to use `stdint.h` unconditionally. Also stop using
`inttypes.h` as an alternative there. `HAVE_INTTYPES_H` wasn't used
anywhere else, allowing to delete this feature check as well.

Closes #12275

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GHA: add workflow to compare configure vs cmake outputs

Uses scripts/cmp-config.pl two compare two curl_config.h files,
presumbly generated with configure and cmake. It displays the

GHA: add workflow to compare configure vs cmake outputs

Uses scripts/cmp-config.pl two compare two curl_config.h files,
presumbly generated with configure and cmake. It displays the
differences and filters out a lot of known lines we ignore.

The script also shows the matches that were *not* used. Possibly
subjects for removal.

Closes #11964

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