Support external links to internal pages

[cicalese]

By default, MediaWiki does not enter links using external link syntax that point to the same server in either the externallinks or pagelinks tables. See $wgRegisterInternalExternals. If that configuration variable is set, such links will show up as external links on the network graph. External links should be examined to see if they are links to the same server, and, if so, they should be displayed as internal links. (I believe this is the case with the links generated by the results of some Semantic MediaWiki queries, which is why this was supported in VIKI. See the third note on the VIKI installation page.)

[cicalese]

You can see this behavior if on one wiki page you add a "normal" link to another wiki page (i.e. [<full URL of wiki page>] as opposed to [[<wiki page title>]]) and then create a Network graph of the first wiki page.

• With $wgRegisterInternalExternals set to false (the default value), the node for the second wiki page and the link to it will not appear on the Network graph at all.
• With $wgRegisterInternalExternals set to true but without #46, the node and link will show up on the graph as an external link.
• With $wgRegisterInternalExternals set to true and with #46, the node and link will show up on the graph as a blue link or red link, depending upon whether the page actually exists.