escape: replace Curl_isunreserved with ISUNRESERVED

- Use the ALLCAPS version of the macro so that it is clear a macro is
being called that evaluates the variable multiple times.

escape: replace Curl_isunreserved with ISUNRESERVED

- Use the ALLCAPS version of the macro so that it is clear a macro is
being called that evaluates the variable multiple times.

- Also capitalize macro isurlpuntcs => ISURLPUNTCS since it evaluates
a variable multiple times.

This is a follow-up to 291d225a which changed Curl_isunreserved into an
alias macro for ISUNRESERVED. The problem is the former is not easily
identified as a macro by the caller, which could lead to a bug.

For example, ISUNRESERVED(*foo++) is easily identifiable as wrong but
Curl_isunreserved(*foo++) is not even though they both are the same.

Closes https://github.com/curl/curl/pull/11846

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ctype: add ISUNRESERVED()

... and make Curl_isunreserved() use that macro instead of providing a
separate funtion for the purpose.

Closes #11840

urlapi: avoid Curl_dyn_addf() for hex outputs

Inspired by the recent fixes to escape.c, we should avoid calling
Curl_dyn_addf() in loops, perhaps in particular when adding something so

urlapi: avoid Curl_dyn_addf() for hex outputs

Inspired by the recent fixes to escape.c, we should avoid calling
Curl_dyn_addf() in loops, perhaps in particular when adding something so
simple as %HH codes - for performance reasons. This change makes the
same thing for the URL parser's two URL-encoding loops.

Closes #10384

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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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curl_ctype: add space around <= operator in ISSPACE macro

Follow-up to f65f750

Closes #9441

curl_ctype: convert to macros-only

This no longer provide functions, only macros. Runs faster and produces
smaller output.

The biggest precaution this change brings:

DO

curl_ctype: convert to macros-only

This no longer provide functions, only macros. Runs faster and produces
smaller output.

The biggest precaution this change brings:

DO NOT use post/pre-increments when passing arguments to the macros.

Closes #9429

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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: remove support for CURL_DOES_CONVERSIONS

TPF was the only user and support for that was dropped.

Closes #8378

copyright: fix year ranges

Follow-up from 4d2f8006777

curl.se: new home

Closes #6172

URL: fix ASCII dependency in strcpy_url and strlen_url

Commit 3c630f9b0af097663a64e5c875c580aa9808a92b partially reverted the
changes from commit dd7521bcc1b7a6fcb53c31f9bd1192fcc884bd56

URL: fix ASCII dependency in strcpy_url and strlen_url

Commit 3c630f9b0af097663a64e5c875c580aa9808a92b partially reverted the
changes from commit dd7521bcc1b7a6fcb53c31f9bd1192fcc884bd56 because of
the problem that strcpy_url() was modified unilaterally without also
modifying strlen_url(). As a consequence strcpy_url() was again
depending on ASCII encoding.

This change fixes strlen_url() and strcpy_url() in parallel to use a
common host-encoding independent criterion for deciding whether an URL
character must be %-escaped.

Closes #2535

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ctype: restore character classification for non-ASCII platforms

With commit 4272a0b0fc49a1ac0ceab5c4a365c9f6ab8bf8e2 curl-speficic
character classification macros and functions were intr

ctype: restore character classification for non-ASCII platforms

With commit 4272a0b0fc49a1ac0ceab5c4a365c9f6ab8bf8e2 curl-speficic
character classification macros and functions were introduced in
curl_ctype.[ch] to avoid dependencies on the locale. This broke curl on
non-ASCII, e.g. EBCDIC platforms. This change restores the previous set
of character classification macros when CURL_DOES_CONVERSIONS is
defined.

Closes #2494

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curl_ctype: private is*() type macros and functions

... since the libc provided one are locale dependent in a way we don't
want. Also, the "native" isalnum() (for example) works differen

curl_ctype: private is*() type macros and functions

... since the libc provided one are locale dependent in a way we don't
want. Also, the "native" isalnum() (for example) works differently on
different platforms which caused test 1307 failures on macos only.

Closes #2269

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