MEDIUM: sample: handle comma-delimited converter list
We now support having a comma-delimited converter list, which can start
right after the fetch keyword. The immediate benefit is that it allows
to use converters in log-format expressions, for example :
set-header source-net %[src,ipmask(24)]
The parser is also slightly improved and should be more resilient against
configuration errors. Also, optional arguments in converters were mistakenly
not allowed till now, so this was fixed.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 5a0269e..eab6827 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -8699,8 +8699,10 @@
support sample fetch rules which allow a list of transformations to be applied
on top of the fetched sample, and the finaly result is automatically converted
to the type of the table. These transformations are enumerated as a series
-of specific keywords after the sample fetch method. These keywords can also
-support some arguments (eg: a netmask) which must be passed in parenthesis.
+of specific keywords after the sample fetch method. These keywords may equally
+be appended immediately after the fetch keyword's argument, delimited by a
+comma. These keywords can also support some arguments (eg: a netmask) which
+must be passed in parenthesis.
The currently available list of transformation keywords include :