add CRASHREPORT directly to browser

add CRASHREPORT for Windows
add ^P info to report (via DUMPLOG)

new options: crash_email, crash_name, crash_urlmax
new game command: #bugreport
new config option: CRASHREPORT_EXEC_NOSTDERR
new command line option: --bidshow

deleted helper scripts:
    NetHackCrashReport.Javascript
    nhcrashreport.lua

misc:
    update CRASHREPORTURL (will need to be updated before release)
    update bitrot in winchain
    winchain for Windows
    add missing synch_wait for NetHackW --showpaths
    add PANICTRACE (and CRASHREPORT) in mdlib.c:build_opts

missing:
    packaging (Windows needs the pdb file)
    no testing with MSVC command line build

port status:
    linux: working, but glibc's backtrace doesn't show static functions
    Windows VS: working.  pdb file is large - looking into options
    MacOS: working
    msdos: not supported
    VMS: not supported
    MSVC: planned, but not attempted
    MSYS2: working, but libbacktrace not showing symbols (yet?)

win/share/nhcrashreport.lua

@@ -1,38 +0,0 @@
-#!./nhlua
--- NetHack 3.7  nhcrashreport.lua       $NHDT-Date: 1693083824 2023/08/26 21:03:44 $  $NHDT-Branch: keni-crashweb2 $:$NHDT-Revision: 1.0 $
---      Copyright (c) 2023 Kenneth Lorber
--- NetHack may be freely redistributed.  See license for details.
-
--- Call with URL then field value pairs.  Opens a new browser window
--- to: URL?field=value+field=value.....
--- This program encodes the values; fieldnames don't require encoding.
---
--- Should be installed in the playground.
-
-----
--- from
--- https://github.com/daurnimator/lua-http/blob/master/http/util.lua
--- Encodes a character as a percent encoded string
-local function char_to_pchar(c)
-	return string.format("%%%02X", c:byte(1,1))
-end
--- encodeURIComponent escapes all characters except the following: alphabetic, decimal digits, - _ . ! ~ * ' ( )
-local function encodeURIComponent(str)
-	return (str:gsub("[^%w%-_%.%!%~%*%'%(%)]", char_to_pchar))
-end
-----
-
-function un20(str)
-    return str:gsub("%%20","+")
-end
-
-url = table.remove(arg,1) .. "?cos=1"; -- Start the query string and set mode
-while #arg > 0 do
-    local field = table.remove(arg,1)
-    local value = table.remove(arg,1)
-    url = url .. "&" .. field .. "=" .. un20(encodeURIComponent(value))
-end
---print("url='"..url.."'")
-cmd = '/usr/bin/xdg-open "'..url..'"'
-os.execute(cmd)
-os.exit()