This Jira is to backport some important fixes and man doc update from upstream:

f6d64dc lib: define cmsg array with correct size in sendv and recvv
2a3a4bc man: add CONTROL MSGS and NOTIFICATIONS in sctp.7
df0cd18 man: add the missing options in SOCKET OPTIONS in sctp.7
1bf0668 man: improve the description in SOCKET OPTIONS in sctp.7
f128c92 man: add some missing items in STATISTICS in sctp.7
90ef63c man: update for DESCRIPTION and SYSCTL in sctp.7
d680721 man: add the missing description for 3 flags in sctp_sendmsg.3
97970af sctp_test: check strdup return in append_addr