add sudoers file to unset requiretty for entrance_client

I'm not sure installing this automatically is the best option, but I think the majority of systems will not work without it so...

.gitignore

@@ -17,6 +17,7 @@ config.sub
 configure
 data/Makefile
 data/Makefile.in
+data/sudoers/entrance
 data/themes/Makefile
 data/themes/Makefile.in
 data/themes/beaumonts/Makefile

configure.ac

@@ -202,6 +202,7 @@ src/Makefile
 src/bin/Makefile
 src/daemon/Makefile
 data/Makefile
+data/sudoers/entrance
 data/themes/Makefile
 data/themes/default/Makefile
 ])

data/Makefile.am

@@ -11,6 +11,9 @@ pam_DATA = entrance
 confdir = $(sysconfdir)
 conf_DATA = entrance.conf
 
+sudoersdir = $(sysconfdir)/sudoers.d
+sudoers_DATA = sudoers/entrance
+
 if HAVE_SYSTEMD
 systemddir = /usr/lib/systemd/system/
 systemd_DATA = entrance.service

data/sudoers/entrance.in

@@ -0,0 +1 @@
+Defaults!@libdir@/entrance/entrance_client !requiretty