[squid-users] supress some special error messages fromm access.log

[Verwaiser]

Hello,
since updating our proxy (now squid 4.03) I get very very many error
messages like the following examples:

/192.168.12.120 - - [30/Aug/2018:12:11:51 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.37 - biew [30/Aug/2018:12:11:51 +0200] "CONNECT
ad11.adfarm1.adition.com:443 HTTP/1.1" 200 1004 TCP_TUNNEL:HIER_DIRECT
192.168.12.117 - - [30/Aug/2018:12:11:51 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.37 - - [30/Aug/2018:12:11:52 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.135 - - [30/Aug/2018:12:11:52 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.52 - - [30/Aug/2018:12:11:52 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.135 - - [30/Aug/2018:12:11:52 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.220 - - [30/Aug/2018:12:11:52 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE
192.168.12.52 - - [30/Aug/2018:12:11:52 +0200] "NONE
error:transaction-end-before-headers NONE/0.0" 0 0 NONE:HIER_NONE/

How can I get rid of these messages? Is it possible to construct an ACL like 

/acl noTransactionError url_regex -i "error:transaction-end-before-headers"
access_log none noTransactionError /

(doesnt work...)

Holger



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