3047 grep support for -r would be useful

*** 14,43 ****
  .SH NAME
  grep \- search a file for a pattern
  .SH SYNOPSIS
  .LP
  .nf
! \fB/usr/bin/grep\fR [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-bhinsvw\fR] \fIlimited-regular-expression\fR
!      [\fIfilename\fR]...
  .fi
  
  .LP
  .nf
! \fB/usr/xpg4/bin/grep\fR [\fB-E\fR | \fB-F\fR] [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-bhinsvwx\fR] \fB-e\fR \fIpattern_list\fR...
!      [\fB-f\fR \fIpattern_file\fR]... [\fIfile\fR]...
  .fi
  
  .LP
  .nf
! \fB/usr/xpg4/bin/grep\fR [\fB-E\fR | \fB-F\fR] [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-bhinsvwx\fR]
!      [\fB-e\fR \fIpattern_list\fR]... \fB-f\fR \fIpattern_file\fR... [\fIfile\fR]...
  .fi
  
  .LP
  .nf
! \fB/usr/xpg4/bin/grep\fR [\fB-E\fR | \fB-F\fR] [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-bhinsvwx\fR] \fIpattern\fR
!      [\fIfile\fR]...
  .fi
  
  .SH DESCRIPTION
  .sp
  .LP
--- 14,45 ----
  .SH NAME
  grep \- search a file for a pattern
  .SH SYNOPSIS
  .LP
  .nf
! \fB/usr/bin/grep\fR [\fB-c\fR | \fB-l\fR |\fB-q\fR] [\fB-r\fR | \fB-R\fR] [\fB-bhinsvw\fR]
!     \fIlimited-regular-expression\fR [\fIfilename\fR]...
  .fi
  
  .LP
  .nf
! \fB/usr/xpg4/bin/grep\fR [\fB-E\fR | \fB-F\fR] [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-r\fR | \fB-R\fR]
!     [\fB-bhinsvwx\fR] \fB-e\fR \fIpattern_list\fR... [\fB-f\fR \fIpattern_file\fR]...
!     [\fIfile\fR]...
  .fi
  
  .LP
  .nf
! \fB/usr/xpg4/bin/grep\fR [\fB-E\fR | \fB-F\fR] [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-r\fR | \fB-R\fR]
!     [\fB-bhinsvwx\fR] [\fB-e\fR \fIpattern_list\fR]... \fB-f\fR \fIpattern_file\fR...
!     [\fIfile\fR]...
  .fi
  
  .LP
  .nf
! \fB/usr/xpg4/bin/grep\fR [\fB-E\fR | \fB-F\fR] [\fB-c\fR | \fB-l\fR | \fB-q\fR] [\fB-r\fR | \fB-R\fR]
!     [\fB-bhinsvwx\fR] \fIpattern\fR [\fIfile\fR]...
  .fi
  
  .SH DESCRIPTION
  .sp
  .LP
*** 130,139 ****
--- 132,161 ----
  .ad
  .RS 6n
  Precedes each line by its line number in the file (first line is 1).
  .RE
  
+ .sp
+ .ne 2
+ .na
+ \fB\fB-r\fR\fR
+ .ad
+ .RS 6n
+ Read all files under each directory, recursively. Follow symbolic links on
+ the command line, but skip symlinks that are encountered recursively. If file
+ is a device, FIFO, or socket, skip it.
+ .RE
+ 
+ .sp
+ .ne 2
+ .na
+ \fB\fB-R\fR\fR
+ .ad
+ .RS 6n
+ Read all files under each directory, recursively, following all symbolic links.
+ .RE
+ 
  .sp
  .ne 2
  .na
  \fB\fB-q\fR\fR
  .ad