/usr/src/openvswitch-1.4.0/lib/vlog-syn.man is in openvswitch-datapath-dkms 1.4.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | .IP "Logging options:"
[\fB\-v\fR[\fImodule\fR[\fB:\fIfacility\fR[\fB:\fIlevel\fR]]]]\&...
.br
[\fB\-\-verbose[=\fImodule\fR[\fB:\fIfacility\fR[\fB:\fIlevel\fR]]]]\&...
.br
[\fB\-\-log\-file\fR[\fB=\fIfile\fR]]
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