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?)

sys/unix/unixmain.c

@@ -151,6 +151,7 @@ main(int argc, char *argv[])
     check_linux_console();
 #endif
 
+    initoptions_init();
     initoptions();
 #ifdef PANICTRACE
     ARGV0 = gh.hname; /* save for possible stack trace */
@@ -766,6 +767,7 @@ opt_showpaths(const char *dir)
     nhUse(dir);
 #endif
     iflags.initoptions_noterminate = TRUE;
+    initoptions_init();
     initoptions();
     iflags.initoptions_noterminate = FALSE;
     reveal_paths();