MFC r283498:

MFC r283498:

Linux nanosleep() and clock_nanosleep() system calls always
writes the remaining time into the structure pointed to by rmtp
unless rmtp is NULL. The value of *rmtp can then be used to call
nanosleep() again and complete the specified pause if the previous
call was interrupted.

Note. clock_nanosleep() with an absolute time value does not write
the remaining time.

While here fix whitespaces and typo in SDT_PROBE.

git-svn-id: svn://svn.freebsd.org/base/stable/10@293598 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f