Basic Auth fails when : is present in password
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                 Key: COUCHDB-969
                 URL: https://issues.apache.org/jira/browse/COUCHDB-969
             Project: CouchDB
          Issue Type: Bug
          Components: HTTP Interface
    Affects Versions: 1.0.1
            Reporter: Isaac Z. Schlueter


To reproduce:

1. Create a new user "testfunkychars" with password "12:12"
2. Logging in as this user in futon works, and will show up as "testfunkychars" 
in the userCtx in a validate_doc_update function.
3. Presenting a header of "Authorization: Basic dGVzdGZ1bmt5Y2hhcnM6MTI6MTI=" 
does not work, and shows up as "null" in userCtx.

According to the RFC 2617, the proper way to supply a Basic authorization 
header is:

Authorization: Basic [basic-credentials]

where [basic-credentials] is the base64 of userid + ":" + pass, where userid is 
*<TEXT except ":"> and pass is *<TEXT>.

Thus, the proper way to construct this header is:

echo -n "testfunkychars:12:12" | base64

which outputs: dGVzdGZ1bmt5Y2hhcnM6MTI6MTI=.

The only way to log in, however, is to POST the data to /_session, and then 
supply the cookie.

For now, rather than add the complexity of cookie and session management to my 
application, I will simply not allow : characters in passwords.  It would be 
better if couchdb handled : characters in passwords.

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