Similar to resetUserTokens.php but uses AuthManager and takes a
list of users (a script for invalidating all users would be
mostly pointless with $wgAuthenticationTokenVersion).
resetUserTokens.php is deprecated, but kept around - mainly in case
we want to transform it into a fast token reset algorithm much like
I6b6e75db2a.
Change-Id: I81450c44a7af26393db7fc61fd5c05f13a13ac3f