Modified the code to skip request logging for all user agents that contain any substring of an ignored agent in the ignore_user_agents config. The previous code only matched the exact string of user_agent with the ignore_user_agents config using in_array function, which resulted in some requests not being skipped from logging. Now, the code uses stristr function to match the string partially and case-insensitive, which improves the functionality of ignore_user_agents.

add more bots strings