Fixes to enable compilation on older systems#3561

Oozlum wants to merge 4 commits into

warmcat:v4.5-stablewarmcat/libwebsockets:v4.5-stablefrom

Oozlum:v4.5-stable-old_system_supportOozlum/libwebsockets:v4.5-stable-old_system_supportCopy head branch name to clipboard