ignore log lines without valid account name in log_processor

[dpgoetz]

ignore log lines like:
Jan 26 22:42:44 proxy1-Z1 proxy-server 1.2.3.4 2.3.4.5 26/Jan/2012/22/42/44 GET /asdfghjk.inc HTTP/1.0 412 - Mozilla/4.75 - - - - tx6b56a39bfadfgsdfgsdfg62b248e54f - 0.0003
Jan 26 22:42:45 proxy1-Z5 proxy-server 6.7.8.9 1.2.3.4 26/Jan/2012/22/42/45 GET /cgi-bin/asdfasdf.sh HTTP/1.0 401 - Mozilla/4.75 - - - - tx70abeff86ecasdfasdf4731049d87b - 0.0012

[briancline]

This is probably remedied with e3a4de5.