ext/standard/tests/strings/crypt_sha256.phpt: fix on musl

Among other things, this test tries to run too few and too many rounds
of SHA256. In both cases, it is expecting an error, but t

ext/standard/tests/strings/crypt_sha256.phpt: fix on musl

Among other things, this test tries to run too few and too many rounds
of SHA256. In both cases, it is expecting an error, but that behavior
depends on the implementation:

* PHP's own implementation raises an error in either case
* libxcrypt raises an error in either case
* Older versions of glibc would clamp the number of rounds
to a valid amount (newer versions don't have libcrypt)
* Musl libc clamps values that are too low, but raises an error
for values that are too high

If PHP is built with --with-external-libcrypt, the musl implementation
above can be used. Even if libxcrypt is installed, PHP will notice
that no additional -lfoo flags are needed to use the crypt
implementation in musl. To pass on such a system, we must not test
for the "too few rounds" behavior.

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Fix typos in test cases for crypt_sha{256,512}

Enforce min/max rounds in sha256/sha512 crypt

This brings our implementation in line with glibc behavior.

Reindent phpt files

Sync leading and final newlines in *.phpt sections

This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines in al

Sync leading and final newlines in *.phpt sections

This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines in all
*.phpt sections.

According to POSIX, a line is a sequence of zero or more non-' <newline>'
characters plus a terminating '<newline>' character. [1] Files should
normally have at least one final newline character.

C89 [2] and later standards [3] mention a final newline:
"A source file that is not empty shall end in a new-line character,
which shall not be immediately preceded by a backslash character."

Although it is not mandatory for all files to have a final newline
fixed, a more consistent and homogeneous approach brings less of commit
differences issues and a better development experience in certain text
editors and IDEs.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
[2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2
[3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2

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Remove superfluous SKIPIF sections of always available constants

Remove superfluous SKIPIF sections of always available functions

Use EXPECT instead of EXPECTF when possible

EXPECTF logic in run-tests.php is considerable, so let's avoid it.

Remove the b prefix from literals on unrelated tests

- #50334, add CRYPT_SHA* constants and tests [DOC]