URI's starting with "//" are not tokenized correctly [zentures/sequence#15]

[leolee192]

@Leftium opened zentures/sequence#15 and commented

Steps to Reproduce:

1. `echo "get //example.com" > input.txt`

2. `go run sequence.go scan --input input.txt`

Expected Results:

#   0: { Tag="funknown", Type="uri", Value="//example.com", ... }

Actual Results:

#   0: { Tag="funknown", Type="literal", Value="//example.com", ... }

Comments:
I found this bug processing an actual log file. One of the log events in question:

81.181.146.13 - - [15/Mar/2005:05:06:49 -0500] "GET //cgi-bin/awstats/awstats.pl?configdir=|%20id%20| HTTP/1.1" 404 1050 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)"

A related question: what is the best way to handle relative URI's? Sequence's heuristic algorithm for processing URI's breaks down on these...

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No further details from zentures/sequence#15