4703 would like xargs support for -P

*** 5,23 ****
  .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
  .\"  This notice shall appear on any product containing this material.
  .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
  .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
  .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
! .TH XARGS 1 "November 24, 2012"
  .SH NAME
  xargs \- construct argument lists and invoke utility
  .SH SYNOPSIS
  .LP
  .nf
  \fBxargs\fR [\fB-t\fR] [\fB-0\fR] [\fB-p\fR] [\fB-e\fR[\fIeofstr\fR]] [\fB-E\fR \fIeofstr\fR]
       [\fB-I\fR \fIreplstr\fR] [\fB-i\fR[\fIreplstr\fR]] [\fB-L\fR \fInumber\fR] [\fB-l\fR[\fInumber\fR]]
!      [\fB-n\fR \fInumber\fR [\fB-x\fR]] [\fB-s\fR \fIsize\fR] [\fIutility\fR [\fIargument\fR...]]
  .fi
  
  .SH DESCRIPTION
  .sp
  .LP
--- 5,24 ----
  .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
  .\"  This notice shall appear on any product containing this material.
  .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
  .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
  .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
! .TH XARGS 1 "March 31, 2014"
  .SH NAME
  xargs \- construct argument lists and invoke utility
  .SH SYNOPSIS
  .LP
  .nf
  \fBxargs\fR [\fB-t\fR] [\fB-0\fR] [\fB-p\fR] [\fB-e\fR[\fIeofstr\fR]] [\fB-E\fR \fIeofstr\fR]
       [\fB-I\fR \fIreplstr\fR] [\fB-i\fR[\fIreplstr\fR]] [\fB-L\fR \fInumber\fR] [\fB-l\fR[\fInumber\fR]]
!      [\fB-n\fR \fInumber\fR [\fB-x\fR]] [\fB-P\fR \fImaxprocs\fR] [\fB-s\fR \fIsize\fR]
!      [\fIutility\fR [\fIargument\fR...]]
  .fi
  
  .SH DESCRIPTION
  .sp
  .LP
*** 169,178 ****
--- 170,189 ----
  .RE
  
  .sp
  .ne 2
  .na
+ \fB\fB-P\fR \fImaxprocs\fR\fR
+ .ad
+ .RS 15n
+ Invokes \fIutility\fR using at most \fImaxprocs\fR (a positive decimal integer)
+ parallel child processes.
+ .RE
+ 
+ .sp
+ .ne 2
+ .na
  \fB\fB-s\fR \fIsize\fR\fR
  .ad
  .RS 15n
  Invokes \fIutility\fR using as many standard input arguments as possible
  yielding a command line length less than \fIsize\fR (a positive decimal