[NET]: Simplify scm handling and sendmsg/recvmsg invocation, consolidate net compat syscalls.
Benjamin LaHaise authored
1) Pull scm argument from sendmsg/recvmsg, it is available
from I/O control block
2) Consolidate networking syscall compat call into net/compat.c
3) Change ops->{sendmsg,recvmsg}() code sequences into sock_{sendmsg,recvmsg}()
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