richholton wrote:

Indeed, this appears to be an issue with the special character "-". From the
MySQL reference manual page on GRANT (http://dev.mysql.com/doc/mysql/en/grant.html):

In order to accommodate granting rights to users from arbitrary hosts, MySQL
supports specifying the user value in the form user_name@host_name. If a
user_name or host_name value is legal as an unquoted identifier, you need not
quote it. However, quotes are necessary to specify a user_name string containing
special characters (such as '-'), or a host_name string containing special
characters or wildcard characters (such as '%'); for example,
'test-user'@'test-hostname'. Quote the username and hostname separately.

In this case, I'm guessing that v4l-wikiuser needs to be quoted for the query to
work.

richholton wrote:

Looks like this particular error can be eliminated by changing
maintenance\users.sql to put quotes around {$wgDBuser}:

GRANT DELETE,INSERT,SELECT,UPDATE ON {$wgDBname}.*
TO '{$wgDBuser}'@'%' IDENTIFIED BY '{$wgDBpassword}';
GRANT DELETE,INSERT,SELECT,UPDATE ON {$wgDBname}.*
TO '{$wgDBuser}'@localhost IDENTIFIED BY '{$wgDBpassword}';
GRANT DELETE,INSERT,SELECT,UPDATE ON {$wgDBname}.*
TO '{$wgDBuser}'@localhost.localdomain IDENTIFIED BY '{$wgDBpassword}';

Note that I've not tested this! (I'm not currently set up to do so...).

Note also that, though this may fix the current bug, there may be related
issues elsewhere.

Fixed the users.sql using Richard J. Holton's patch.