Removed the documentation files because they were making the httpd

source checkout too large, added a README file pointing to the reference
copy of the docs in the PCRE vendor branch


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@106747 13f79535-47bb-0310-9956-ffa450edef68

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diff --git a/srclib/pcre/doc/pgrep.txt b/srclib/pcre/doc/pgrep.txt
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-NAME
-     pgrep - a grep with Perl-compatible regular expressions.
-
-
-
-SYNOPSIS
-     pgrep [-Vchilnsvx] pattern [file] ...
-
-
-
-DESCRIPTION
-     pgrep searches files for character patterns, in the same way
-     as  other  grep  commands  do,  but it uses the PCRE regular
-     expression library to support patterns that  are  compatible
-     with  the  regular  expressions of Perl 5. See pcre(3) for a
-     full description of syntax and semantics.
-
-     If no files are specified, pgrep reads the  standard  input.
-     By  default, each line that matches the pattern is copied to
-     the standard output, and if there is more than one file, the
-     file  name  is  printed before each line of output. However,
-     there are options that can change how pgrep behaves.
-
-     Lines are limited to BUFSIZ characters. BUFSIZ is defined in
-     <stdio.h>.  The newline character is removed from the end of
-     each line before it is matched against the pattern.
-
-
-
-OPTIONS
-     -V        Write the version number of the PCRE library being
-               used to the standard error stream.
-
-     -c        Do not print individual lines; instead just  print
-               a  count  of the number of lines that would other-
-               wise have  been  printed.  If  several  files  are
-               given, a count is printed for each of them.
-
-     -h        Suppress printing of filenames when searching mul-
-               tiple files.
-
-     -i        Ignore upper/lower case distinctions  during  com-
-               parisons.
-
-     -l        Instead of printing lines  from  the  files,  just
-               print the names of the files containing lines that
-               would have been printed. Each file name is printed
-               once, on a separate line.
-
-     -n        Precede each line by its line number in the file.
-
-     -s        Work silently, that  is,  display  nothing  except
-               error messages.  The exit status indicates whether
-               any matches were found.
-
-     -v        Invert the sense of the match, so that lines which
-               do not match the pattern are now the ones that are
-               found.
-
-     -x        Force the pattern to be anchored  (it  must  start
-               matching  at  the  beginning  of  the line) and in
-               addition, require it to  match  the  entire  line.
-               This is equivalent to having ^ and $ characters at
-               the start and end of each  alternative  branch  in
-               the regular expression.
-
-
-
-SEE ALSO
-     pcre(3), Perl 5 documentation
-
-
-
-
-
-DIAGNOSTICS
-     Exit status is 0 if any matches were found, 1 if no  matches
-     were  found,  and  2  for syntax errors or inacessible files
-     (even if matches were found).
-
-
-
-AUTHOR
-     Philip Hazel <ph10@cam.ac.uk>
-     Copyright (c) 1997-1999 University of Cambridge.
-