svn path=/trunk/; revision=1466
* FAQ update, including a major new item on how to protect your password.
* Added code to have %F in an MDA string expand to the From address
* Added code to prevent buffer spamming via the MDA %T/%s escape.
+* Luca Olivetti's --qvirtual option patch for qmail users.
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# authenticate (or auth) -- must be followed by an authentication type
# timeout -- must be followed by a numeric timeout value
# envelope -- must be followed by an envelope header name
+# qvirtual -- must be followed by a name prefix
# no envelope
# aka -- must be followed by one or more server aliases
# localdomains -- must be followed by one or more domain names