bind() fails if it is called before setting SO_REUSEPORT and another process is already binded to the same addess. A new reuse_port option has been introduced to socket_address_listen() to set the option as part of socket initialization.
basic/ can be used by everything cannot use anything outside of basic/ libsystemd/ can use basic/ cannot use shared/ shared/ can use libsystemd/
Christos Trochalakis
Kay Sievers