doc: use symbolic names for chain priorities

This replaces the numbers with the matching symbolic names with one
exception: The NAT example used "priority 0" for the prerouting
priority. This is replaced by "dstnat" which has priority -100 which is
the new recommended priority.

Also use spaces instead of tabs for consistency in lines which require
updates.

Signed-off-by: Simon Ruderich <simon@ruderich.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/stateful-objects.txt b/doc/stateful-objects.txt
index 32a3a5c8..c7488b28 100644
--- a/doc/stateful-objects.txt
+++ b/doc/stateful-objects.txt
@@ -34,7 +34,7 @@ table inet myhelpers {
      type "ftp" protocol tcp
   }
   chain prerouting {
-      type filter hook prerouting priority 0;
+      type filter hook prerouting priority filter;
       tcp dport 21 ct helper set "ftp-standard"
   }
 }