* eio-seek.xml: amend `whence` parameter
* eio-seek.xml: change constant names
* eio-seek.xml: shornet the `reppurpose`
* eio-seek.xml: add a dot at the end of the sentence
* Update reference/eio/functions/eio-seek.xml
Amend the constant name
Co-authored-by: Gina Peter Banyard <girgias@php.net>
* eio-seek.xml: remove para about 'optional' `whence` parameter
Remove the paragraph about the alleged optionality the `whence` parameter (is was merely a copy-paste from https://www.php.net/manual/en/splfileobject.fseek.php)
* eio-seek.xml: change 'socket resource' to 'Socket instance'
The Socket replaces socket resources as of PHP 8.0.0.
* eio-seek.xml: wrap Socket with the `classname` tag
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Co-authored-by: Gina Peter Banyard <girgias@php.net>
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