Refactor unlink(1) code and manpage

Remove superfluous stdlib.h-include.

README

@@ -75,7 +75,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
 =* uname           yes                             none
 #* unexpand        yes                             none
 =  uniq            no                              -f, -s
-=  unlink          yes                             none
+=* unlink          yes                             none
 =  uudecode        no                              -o
 =  uuencode        no                              -m
    seq             non-posix                       none

unlink.1

@@ -1,17 +1,23 @@
-.Dd January 30, 2015
+.Dd February 8, 2015
 .Dt UNLINK 1
 .Os sbase
 .Sh NAME
 .Nm unlink
-.Nd call the unlink function
+.Nd unlink file
 .Sh SYNOPSIS
 .Nm
 .Ar file
 .Sh DESCRIPTION
 .Nm
-calls the
+calls
 .Xr unlink 2
-function on
+on
 .Ar file .
 .Sh SEE ALSO
 .Xr unlink 2
+.Sh STANDARDS
+The
+.Nm
+utility is compliant with the
+.St -p1003.1-2008
+specification.

unlink.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <stdlib.h>
 #include <unistd.h>
 
 #include "util.h"