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5f713c03be
This fixes the fd leak, introduced in the commit d3fc982cd788
("MEDIUM: proto: make common fd checks in sock_create_server_socket").
Initially sock_create_server_socket() was designed to return only created
socket FD or -1. Its callers from upper protocol layers were required to test
the returned errno and were required then to apply different configuration
related checks to obtained positive sock_fd. A lot of this code was duplicated
among protocols implementations.
The new refactored version of sock_create_server_socket() gathers in one place
all duplicated checks, but in order to be complient with upper protocol
layers, it needs the 3rd parameter: 'stream_err', in which it sets the
Stream Error Flag for upper levels, if the obtained sock_fd has passed all
additional checks.
No backport needed since this was introduced in 3.0-dev10.