Clarify the documentation about DF-flag

Remove the reference to setting the DF-flag as we don't do that right
now.  Rephrase the paragraph that the default value should not be
causing fragmentation.

diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index 2604b6e71d47f1e23572c902e255212b5b736251..84cacb4c94e5c5676adcdde430b6d5c2caa8c164 100644 (file)
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -4349,9 +4349,8 @@ Tuning
    dropping patterns, the query is retried over TCP.  Per-server EDNS statistics
    are only retained in memory for the lifetime of a given server's ADB entry.
 
-   The :iscman:`named` now sets the DON'T FRAGMENT flag on outgoing UDP packets.
-   According to the measurements done by multiple parties this should not be
-   causing any operational problems as most of the Internet "core" is able to
+   According to the measurements done by multiple parties the default value
+   should not be causing the fragmentation as most of the Internet "core" is able to
    cope with IP message sizes between 1400-1500 bytes, the 1232 size was picked
    as a conservative minimal number that could be changed by the DNS operator to
    a estimated path MTU minus the estimated header space. In practice, the