Don't apply scalefactor on legend keyimage (#4885)
Fix failed assertion with non-existant svg symbols (#4899)
add scripts to provision a mapserver vagrant instance
Merge branch 'branch-6-4'

Conflicts:
	maplegend.c
master specific vagrant changes
vagrant: use an automatic mirror for downloading debs
Merge branch 'branch-6-4'
Merge branch 'master' of https://github.com/mapserver/mapserver into rfc91-filter-transform