README: document new /etc/mtab requirement

diff --git a/README b/README
index 27cc9a01681829af75365e8c06272be4ffbe7dc9..62fd2487753015bf76f678a99d2c8c5188097da7 100644 (file)
--- a/README
+++ b/README
@@ -244,9 +244,9 @@ SYSV INIT.D SCRIPTS:
         needs to look like, and provide an implementation at the marked places.
 
 WARNINGS:
-        systemd will warn you during boot if /etc/mtab is not a
-        symlink to /proc/mounts. Please ensure that /etc/mtab is a
-        proper symlink.
+        systemd will freeze execution during boot if /etc/mtab exists
+        but is not a symlink to /proc/mounts. Please ensure that
+        /etc/mtab is a proper symlink.
 
         systemd will warn you during boot if /usr is on a different
         file system than /. While in systemd itself very little will