This got ignored as a shared object during the import. Add it back as

it's necessary for the doc process.

usr.bin/vi/USD.doc/vi.ref/ref.so

@@ -0,0 +1,127 @@
+.\" Copyright (c) 1994
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)ref.so	8.6 (Berkeley) 7/15/94
+.\"
+.\"
+.\" indented paragraph, with spaces between the items, bold font
+.de IP
+.\".tm arg 1 \\$1 arg 2 \\$2 arg 3 \\$3
+.sp 1
+.nr PS \\n(ps
+.nr ps 0
+.ip "\fB\\$1\fP" \\$2
+.nr ps \\n(PS
+.br
+..
+.\" indented paragraph, no spaces between the items, bold font
+.de Ip
+.\".tm arg 1 \\$1 arg 2 \\$2 arg 3 \\$3
+.nr PS \\n(ps
+.nr ps 0
+.ns
+.ip "\fB\\$1\fP" \\$2
+.nr ps \\n(PS
+.br
+..
+.\" start nested .IP
+.de SS
+.sp
+.ba +5n
+..
+.\" end nested .IP
+.de SE
+.ba -5n
+..
+.\" nested .IP, no spaces, normal font
+.de SP
+.\".tm arg 1 \\$1 arg 2 \\$2 arg 3 \\$3
+.nr PS \\n(ps
+.nr ps 0
+.ns
+.ip "\\$1" 9n
+.nr ps \\n(PS
+..
+.\" typewriter font
+.de LI
+\&\fC\\$1\fP\\$2
+..
+.\" ex/vi names in command font
+.de EV
+\&\fB\\$1\fP/\fB\\$2\fP\\$3
+..
+.\" command names
+.de CO
+\&\fB\\$1\fP\\$2
+..
+.\" key words for index
+.de KY
+.sy echo >>index '\\$1	\\n%'
+..
+.\" option names
+.de OP
+\&\fB\\$1\fP\\$2
+..
+.\" paren quoted (typewriter font)
+.de PQ
+(\*(lq\fC\\$1\fP\*(rq)\\$2
+..
+.\" quoted bold
+.de QB
+\*(lq\fB\\$1\fP\*(rq\\$2
+..
+.\" quoted command
+.de QC
+\*(lq\fB\\$1\fP\*(rq\\$2
+..
+.\" quoted option
+.de QO
+\*(lq\fB\\$1\fP\*(rq\\$2
+..
+.\" quoted (no font change)
+.de QQ
+\*(lq\\$1\*(rq\\$2
+..
+.\" quoted (typewriter font)
+.de QT
+\*(lq\fC\\$1\fP\*(rq\\$2
+..
+.\" section macro to build TOC
+.de SH
+.(x
+\\$2
+.)x
+.sh \\$1 "\\$2"
+..
+.\" manual section
+.de XR
+\&\fI\\$1\fP(\\$2)\\$3
+..