Description:
------------
Apparently, the ini setting phpdbg.eol defaults to "2"[1] which
corresponds to PHPDBG_EOL_CR[2] which appears to be very uncommon
nowadays.  Is this perhaps a related to the out-commented
PHPDBG_EOL_LFCR[3], and the default is actually supposed to be
"1"?

Even more confusing, setting phpdbg.eol to a numeric value is
apparently not allowed, see test script.  I would either expect
that this is allowed, or that the setting would default to "CR"
instead of "2".

Anatol, since you introduced this ini setting[4], could you please
have a look at this?

[1] <https://github.com/php/php-src/blob/PHP-7.2.7/sapi/phpdbg/phpdbg.c#L74>
[2] <https://github.com/php/php-src/blob/PHP-7.2.7/sapi/phpdbg/phpdbg_eol.h#L34>
[3] <https://github.com/php/php-src/blob/PHP-7.2.7/sapi/phpdbg/phpdbg_eol.h#L32>
[4] <http://git.php.net/?p=php-src.git;a=commit;h=e011f0ca60a7d4d062b559dbbf7cfabef8f7a75b>

Test script:
---------------
<?php

var_dump(ini_get('phpdbg.eol'));
var_dump(ini_set('phpdbg.eol', "2"));
var_dump(ini_get('phpdbg.eol'));
var_dump(ini_set('phpdbg.eol', 'CR'));
var_dump(ini_get('phpdbg.eol'));


Actual result:
--------------
string(1) "2"
bool(false)
string(1) "2"
string(1) "2"
string(2) "CR"