4703 would like xargs support for -P

@@ -5,19 +5,20 @@
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-.TH XARGS 1 "November 24, 2012"
+.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-s\fR \fIsize\fR] [\fIutility\fR [\fIargument\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

@@ -169,10 +170,20 @@
 .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