E-mail notification. Parameters:
- $1 is the username of the person who linked the page, plain text. Can be used for GENDER.
- $2 is the username of the person who linked the page, HTML formatted.
- $3 is the page to which new links are added.
- $4 is the link to the page with new links added.
- $5 is a comma separated list of pages being linked.
- $6 is the number of pages being linked.
- $7 is the e-mail footer, ("$2
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