Allow parameter %u for PrintjobUsername instead of %U

[boyang]

Hi, All:
    The default value of szPrintjobUsername must be %u instead of %U to
keep the case of the username. Otherwise, standard_sub_advance() and 
standard_sub_basic() have the same effect. That is to say, %U will always 
be substitued with lower-case username.
    Patches for v3-[023]-test are in the attachment.
    Please review them.
    Thanks!

Best
     Regards
BoYang
17th, Jul
-------------- next part --------------
A non-text attachment was scrubbed...
Name: print-job-username-v3-0-test.diff
Type: text/x-patch
Size: 642 bytes
Desc: not available
Url : http://lists.samba.org/archive/samba-technical/attachments/20080717/fd5bfa4f/print-job-username-v3-0-test.bin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: print-job-username-v3-2-test.diff
Type: text/x-patch
Size: 593 bytes
Desc: not available
Url : http://lists.samba.org/archive/samba-technical/attachments/20080717/fd5bfa4f/print-job-username-v3-2-test.bin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: print-job-username-v3-3-test.diff
Type: text/x-patch
Size: 593 bytes
Desc: not available
Url : http://lists.samba.org/archive/samba-technical/attachments/20080717/fd5bfa4f/print-job-username-v3-3-test.bin