- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Sync program's usage() with manpage's SYNOPSIS.

Added the EXIT STATUS section where appropriate.

mdoc(7) police: minor markup nits.

#include <unistd.h> for getopt() and friends.

PR: 36130
Approved by: mike

Use getopt() to reject options (asa has none), and to the "--" end of options
marker. Exit non-zero if we cannot open one of the input files. Update
standards conformance and exit status statements in manual page.

PR: 36130
Approved by: mike

Remove __P,
Don't prototype main(),
C89-style function declarations,
char **argv -> char *argv[] for main()

PR: 36130
Approved by: mike

style(9): remove space between function name and opening parentheses,
sort variables, NULL is the null-pointer constant, remove unnecessary
braces.

PR: 36130
Approved by: mike

Add the POSIX.2 asa utility, which interprets FORTRAN carriage-control
characters.

PR: 36130
Approved by: mike
Obtained from: NetBSD