journald: take leading spaces into account in syslog_parse_identifier
    
    This is a kind of follow-up to e88baee88fad8bc59d3 which should finally fix
    the issue which that commit was supposed to fix.
    
    (cherry picked from commit 937b1171378bc1000a34fcdfe9534d898227e35f)
    
    Resolves: #1764560
    
    patch_name: 0265-journald-take-leading-spaces-into-account-in-syslog_.patch
    present_in_specfile: true
    location_in_specfile: 265
    squash_commits: true