sctp: allow unsetting sockopt MAXSEG
RFC 6458 Section 8.1.16 says that setting MAXSEG as 0 means that the user is not limiting it, and not that it should set to the *current* maximum, as we are doing. This patch thus allow setting it as 0, effectively removing the user limit. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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