[Patch] let sessreg build with utmpx exclusively

[Alan Coopersmith]

Ed Schouten wrote:
> Hi folks,
> 
> We at FreeBSD very recently gained support for utmpx, while removing
> utmp entirely. Our utmpx interface is very compact and should be quite
> pleasant to use. There aren't a lot of extensions to POSIX, which is
> described here:
> 
> 	http://www.opengroup.org/onlinepubs/9699919799/basedefs/utmpx.h.html
> 	http://www.opengroup.org/onlinepubs/9699919799/functions/endutxent.html
> 
> It seens the sessreg app is a bit antique and really depends on utmp
> being there. I've attached a patch to make it build with FreeBSD HEAD
> again.

The utmpx support was written on Solaris, which while it dropped the utmp
& wtmp files years ago, left the headers & functions for backwards
compatibility, so we never had to support building without them.

The patch looks pretty good, and I've confirmed it still builds fine on
Solaris.   I do see one small style nit - the #ifdef/#endif indentation
doesn't match here, which could be confusing:

+# ifdef HAVE_UTMPX_NAME
+           if (utmpx_file != NULL)
+#endif

Can you add a 'Signed-off-by' tag  ("git commit --amend -s" should do that),
and then submit the patch as output from git format-patch?   That will help
us preserve the authorship and your comments, and I'll push that.

-- 
	-Alan Coopersmith-           alan.coopersmith at sun.com
	 Sun Microsystems, Inc. - X Window System Engineering