epoll_ctl.2: Document EPOLLWAKEUP

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
epoll_ctl.2: Minor tweaks to Neil Brown's patch

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
epoll.7: Document EPOLLWAKEUP

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
epoll.7: Minor tweaks to Neil Brown's patch

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
epoll_ctl.2: BUGS: EPOLLWAKEUP is silently ignored without CAP_BLOCK_SUSPEND

If the caller does not have CAP_BLOCK_SUSPEND, then EPOLLWAKEUP
is silently ignored.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
pipe.2: PIPE_BUF is defined in limits.h

To make use of PIPE_BUF in an application one should include limits.h.
Adding a reference to this inclusion.

Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
pipe.7: Add reference that the pipe capacity can be changed.

In fcntl(2) F_SETPIPE_SZ, F_GETPIPE_SZ and /proc/sys/fs/pipe-max-size are
defined, however pipe(7) still defines the pipe capacity as being a static
entity. Adding a reference to fcntl(2).

Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>