* src/chfn.c, src/chsh.c, src/groupdel.c, src/groupmems.c,

src/groupmod.c, src/grpck.c, src/login.c, src/logoutd.c,
	src/newgrp.c, src/newusers.c, src/passwd.c, src/pwck.c,
	src/suauth.c, src/useradd.c, src/userdel.c, src/usermod.c,
	src/vipw.c: Complete the switch from the `' quotation style to ''.
	Do it also in SYSLOG messages. Quote some parameters. All this
	permits to merge some messages.

src/logoutd.c

@@ -263,7 +263,7 @@ int main (int argc, char **argv)
 			user[sizeof (user) - 1] = '\0';
 
 			SYSLOG ((LOG_NOTICE,
-				 "logged off user `%s' on `%s'", user,
+				 "logged off user '%s' on '%s'", user,
 				 tty_name));
 
 			/*