[squid-users] header_replace: Can items be merged?

[Jenny Lee]

Hello folks,
 
acl BADGUY dstdomain somewhere
header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit) BADGUY
 
Is there any way to do this? It is sucking in the whole line as UA (as 
expected). Quotation marks did not help.
 
Any ideas?
 
J