Add mandoc-manpage for link(1)

and mark it as finished in the README.

README

@@ -36,7 +36,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
 =* head            yes                             none
 =  hostname        non-posix                       none
 =* kill            yes                             none
-=  link            yes                             none
+=* link            yes                             none
 =  ln              yes                             none
 =* logger          yes                             none
 =  logname         yes                             none

link.1

@@ -1,14 +1,18 @@
-.TH LN 1 sbase\-VERSION
-.SH NAME
-link \- create a hard link by calling the link function
-.SH SYNOPSIS
-.B link
-.I target
-.I linkname
-.P
-.SH DESCRIPTION
-.B link
-creates a hard link to a given file, with the given name.
-.SH SEE ALSO
-.IR ln (1),
-.IR link (2)
+.Dd January 25, 2015
+.Dt LINK 1 sbase\-VERSION
+.Sh NAME
+.Nm link
+.Ar target
+.Ar name
+.Sh DESCRIPTION
+.Nm
+creates a hard link
+.Ar name
+to
+.Ar target .
+.Sh STANDARDS
+The
+.Nm
+utility is compliant with the
+.St -p1003.1-2008
+specification.

link.c

@@ -10,7 +10,7 @@ main(int argc, char *argv[])
 	argv0 = argv[0];
 
 	if (argc != 3)
-		eprintf("usage: %s target linkname\n", argv0);
+		eprintf("usage: %s target name\n", argv0);
 	if (link(argv[1], argv[2]) < 0)
 		eprintf("link:");
 	return 0;