agetty: re-add utmp.h for Debian GNU/kFreeBSD

It's needed there to get login_tty(). On normal FreeBSD we would
need libutil.h.

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>

configure.ac

@@ -208,6 +208,7 @@ AC_CHECK_HEADERS([ \
 	getopt.h \
 	inttypes.h \
 	lastlog.h \
+	libutil.h \
 	linux/btrfs.h \
 	linux/cdrom.h \
 	linux/falloc.h \
@@ -257,6 +258,7 @@ AC_CHECK_HEADERS([ \
 	sys/un.h \
 	unistd.h \
 	shadow.h \
+	utmp.h \
 	utmpx.h \
 ])
 

term-utils/agetty.c

@@ -55,7 +55,13 @@
 #endif
 
 #if defined(__FreeBSD_kernel__)
-#include <pty.h>
+# include <pty.h>
+# ifdef HAVE_UTMPX_H
+#  include <utmp.h>
+# endif
+# ifdef HAVE_LIBUTIL_H
+#  include <libutil.h>
+# endif
 #endif
 
 #ifdef __linux__