Make startoffset a synonym of offset in pcre2test.

ChangeLog

@@ -327,6 +327,9 @@ property was also in the class (if PCRE2_UCP is set, escapes such as \w are
 turned into Unicode properties), wide characters were not correctly handled, 
 and could fail to match.
 
+98. In pcre2test, make the "startoffset" modifier a synonym of "offset", 
+because it sets the "startoffset" parameter for pcre2_match().
+
 
 Version 10.20 30-June-2015
 --------------------------

doc/pcre2test.1

@@ -1,4 +1,4 @@
-.TH PCRE2TEST 1 "14 November 2015" "PCRE 10.21"
+.TH PCRE2TEST 1 "21 November 2015" "PCRE 10.21"
 .SH NAME
 pcre2test - a program for testing Perl-compatible regular expressions.
 .SH SYNOPSIS
@@ -959,6 +959,7 @@ pattern.
       recursion_limit=<n>       set a recursion limit
       replace=<string>          specify a replacement string
       startchar                 show startchar when relevant
+      startoffset=<n>           same as offset=<n>
       zero_terminate            pass the subject as zero-terminated
 .sp
 The effects of these modifiers are described in the following sections.
@@ -1609,6 +1610,6 @@ Cambridge, England.
 .rs
 .sp
 .nf
-Last updated: 14 November 2015
+Last updated: 21 November 2015
 Copyright (c) 1997-2015 University of Cambridge.
 .fi

src/pcre2test.c

@@ -572,6 +572,7 @@ static modstruct modlist[] = {
   { "replace",             MOD_PND,  MOD_STR, REPLACE_MODSIZE,           PO(replacement) },
   { "stackguard",          MOD_PAT,  MOD_INT, 0,                         PO(stackguard_test) },
   { "startchar",           MOD_PND,  MOD_CTL, CTL_STARTCHAR,             PO(control) },
+  { "startoffset",         MOD_DAT,  MOD_INT, 0,                         DO(offset) },
   { "substitute_extended", MOD_PAT,  MOD_CTL, CTL_SUBSTITUTE_EXTENDED,   PO(control) },
   { "tables",              MOD_PAT,  MOD_INT, 0,                         PO(tables_id) },
   { "ucp",                 MOD_PATP, MOD_OPT, PCRE2_UCP,                 PO(options) },

testdata/testinput2

@@ -1328,7 +1328,7 @@
   ab cd\=offset=1
 
 /\b.*/Is
-  ab cd\=offset=1
+  ab cd\=startoffset=1
 
 /(?!.bcd).*/I
   Xbcd12345

testdata/testoutput2

@@ -5181,7 +5181,7 @@ Max lookbehind = 1
 May match empty string
 Options: dotall
 Subject length lower bound = 0
-  ab cd\=offset=1
+  ab cd\=startoffset=1
  0:  cd
 
 /(?!.bcd).*/I