[Dovecot] proxy: get rid of redundant log-informations

Hi

login_log_format_elements = user=<%u> method=%m rip=%r %k

is it possible to get rid of the "proxy(test@testserver.rhsoft.net): started proxying to 127.0.0.1:143: " part because on a proxy-only server i know that and it is explicitly not listed in "login_log_format_elements"

as well as for the "TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA" it would be enough "TLSv1 DHE-RSA-CAMELLIA256-SHA"

the reason is simple:

• all needed informations are present
• smaller logfiles
• nicer "tail -f" on the syslog without breaks

Aug 14 16:31:46 testserver dovecot: imap-login: proxy(test@testserver.rhsoft.net): started proxying to 127.0.0.1:143: user=test@testserver.rhsoft.net, method=CRAM-MD5, rip=91.118.73.99, TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)