[PATCH] man2: new page describing memfd_secret() system call

[Alejandro Colomar]

* Mike Rapoport:
 > +.PP
 > +.IR Note :
 > +There is no glibc wrapper for this system call; see NOTES.

You added a reference to NOTES, but then in notes there is nothing about 
it.  I guess you wanted to add the following to NOTES (taken from 
membarrier.2):

.PP
Glibc does not provide a wrapper for this system call; call it using
.BR syscall (2).

Cheers,

Alex