DOC: fix date and http_date keywords syntax
These keywords received a second argument with commit ae6f125 ("MINOR:
sample: add us/ms support to date/http_date"). Each argument is optional,
it's not either both or none.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index d8fe6b6..0bb7313 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -13245,7 +13245,7 @@
Converts a hex string containing two hex digits per input byte to an
integer. If the input value cannot be converted, then zero is returned.
-http_date([<offset, unit>])
+http_date([<offset],[<unit>])
Converts an integer supposed to contain a date since epoch to a string
representing this date in a format suitable for use in HTTP header fields. If
an offset value is specified, then it is added to the date before the
@@ -14066,7 +14066,7 @@
high cpu_calls count, for example when processing many HTTP chunks, and for
this reason it is often preferred to log cpu_ns_avg instead.
-date([<offset>, <unit>]) : integer
+date([<offset>],[<unit>]) : integer
Returns the current date as the epoch (number of seconds since 01/01/1970).
If an offset value is specified, then it is added to the current date before