HttpClient has two distinct methods--setRequestHeader and addRequestHeader.
meth.setRequestHeader("User-Agent", "FOO");
meth.setRequestHeader("User-Agent", "BAR");
should yield "User-Agent: BAR"
meth.addRequestHeader("User-Agent", "FOO");
meth.addRequestHeader("User-Agent", "BAR");
should yield "User-Agent: FOO; BAR"
See
http://jakarta.apache.org/commons/httpclient/api/org/apache/commons/httpclie
nt/HttpMethod.html
