basic_functions: update error_log documentation [skip ci] #17828
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Sending to a TCP/IP address is not an option anymore, and it hasn't been since before the file was created in this repo in 1999 (257de2b). Based on php/doc-en@d522d13 it appears that this feature was part of PHP 3 and removed before PHP 4. I tried to track down the original code to find when it was actually removed but wasn't able to find a PHP 3 repository.