increase source_url column size to 2048

Needed to store an authtoken(max 512) together with the url.
The max size of an URL in older browsers are 2048 so use this as limit.
Automatic commit of package [spacewalk-schema] release [2.3.18-1].
fixing javascript injection on /rhn/systems/details/configuration/addfiles/ImportFileConfirm.do page
Automatic commit of package [spacewalk-java] release [2.3.54-1].
adding patternfly1 to spacewalk server comps
1150982 - coping with old python

RHEL5's python does not have collections.defaultdict
Automatic commit of package [spacewalk-reports] release [2.3.5-1].
blacklist heirloom-pkgtools for rhel7
1150980 - extend user.getDetails API

with: read_only and errata_notification
1132398 - fix debian repo generation and unused code cleanup
Automatic commit of package [spacewalk-java] release [2.3.55-1].
close forgotten div in lists
style SSM status bar
fixing javascript injection on /rhn/kickstart/KickstartOverview.do page
1013672 - add id to errata.getDetails APIdoc
1150980 - add read_only and errata_notification to user.getDetails APIdoc
fix javascript injection on /rhn/systems/details/kickstart/ScheduleWizard.do page
Automatic commit of package [spacewalk-java] release [2.3.56-1].
remove header of always empty section
style /rhn/kickstart/SystemDetailsEdit page

and fix unnecessarily divided strings