[Nutch Wiki] Trivial Update of "HttpAuthenticationSchemes" by susam

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The following page has been changed by susam:
http://wiki.apache.org/nutch/HttpAuthenticationSchemes

The comment on the change is:
fixed typo

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  However, an important thing to note here is that if some page of example:8080 requires authentication in another realm, say, 'mail', authentication would not be done even though the second set of credentials is defined as default. Of course this doesn't affect authentication for other web servers and the default authscope would be used for other web-servers. This problem occurs only for those web-servers which have authentication scopes defined for a few selected realms/schemes. This is discussed in next section.
  
  === Catch-all Authentication Scope for a Web Server ===
- When one or more authentication scopes are defined for a particular web server (host:port), then the default credentials is ignored for that host:port combination. Therefore, an catch-all authentication scope to handle all other realms and scopes must be specified explicitly as shown below.
+ When one or more authentication scopes are defined for a particular web server (host:port), then the default credentials is ignored for that host:port combination. Therefore, a catch-all authentication scope to handle all other realms and scopes must be specified explicitly as shown below.
  
  {{{
  <credentials username="susam" password="masus">