Remove stray "DO NOT DELETE" line, which bmake apparently put in without
my knowledge or consent. I did not intend to commit this.

Add casts to work around harmless -Werror warnings from clang 10.0.0,
such as:

usr.sbin/timed/timed/networkdelta.c:160:13: error: implicit conversion from 'long' to 'float' changes value from 9223372036854775807 to 9223372036854775808
[-Werror,-Wimplicit-int-float-conversion]
float ap = LONG_MAX; /* bounds on the median */
~~ ^~~~~~~~

Direct commit to stable/{10,11,12}, since timed has been removed from
FreeBSD 13.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

This commit was generated by cvs2svn to compensate for changes in r1553,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite usr.sbin Sources