link.thingscloud freeswitch-externals 2.2.0 4.0.0 freeswitch-esl freeswitch-esl-${project.version} freeswitch event socket library on netty 4.1 io.netty netty-handler io.netty netty-transport io.netty netty-transport-native-epoll linux-x86_64 io.netty netty-transport-native-kqueue osx-x86_64 org.slf4j slf4j-api ch.qos.logback logback-core ch.qos.logback logback-classic