DOC: Fix typo in iif() example
It should read 'iif', not 'iff'.
Reported-by: Miroslav Zagorac <zaga@fly-etf.net>
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 0e34f62..075d3d5 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -15155,7 +15155,7 @@
string otherwise.
Example:
- http-request set-header x-forwarded-proto %[ssl_fc,iff(https,http)]
+ http-request set-header x-forwarded-proto %[ssl_fc,iif(https,http)]
in_table(<table>)
Uses the string representation of the input sample to perform a look up in