Description:
------------


From PHP src php-5.6.10.tar.gz, the example php-5.6.10/php.ini-development and php-5.6.10/php.ini-production config files have comments that reference several URLs which are 404:

//php.net/enable-post-data-reading
//php.net/internal-encoding
//php.net/input-encoding
//php.net/output-encoding
//php.net/pdo_mysql.cache_size
//php.net/pdo_mysql.default-socket
//php.net/mysql.cache_size
//php.net/mysqli.max-persistent
//php.net/mysqli.cache_size
//php.net/mysqlnd.collect_statistics
//php.net/mysqlnd.collect_memory_statistics
//php.net/mysqlnd.net_cmd_buffer_size
//php.net/mysqlnd.net_read_buffer_size


Note: I removed http from the URLs to avoid setting off is_spam() per https://github.com/php/web-bugs/blob/master/include/functions.php

Test script:
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curl -s http://php.net/distributions/php-5.6.10.tar.gz|tar xz && grep '; http://php.net' php-5.6.10/php.ini-development|awk '{ print $NF }'|while read phpurl; do location=`curl -s -I "$phpurl"|grep Location:|tail -n1`; if [[ $location == *"show=404"* ]]; then echo "$phpurl 404: $location" | tee -a php.404; fi; sleep 1; done

Expected result:
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Expecting specific documentation available when referenced.