[Bug] libopts compiler warnings

[fklassen]

Describe the bug
Getting many libopts compiler warnings on Debian Buster

To Reproduce
Steps to reproduce the behavior:

1. make maintainer-clean
2. ./autogen.sh
3. ./configure
4. make

Expected behavior
no warnings

Screenshots

In file included from libopts.c:32:
makeshell.c: In function ‘text_to_var’:
makeshell.c:324:14: warning: this statement may fall through [-Wimplicit-fallthrough=]
             (*(opts->pUsageProc))(opts, EXIT_SUCCESS);
             ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
makeshell.c:327:9: note: here
         case TT_USAGE:
         ^~~~
makeshell.c:328:14: warning: this statement may fall through [-Wimplicit-fallthrough=]
             (*(opts->pUsageProc))(opts, EXIT_FAILURE);
             ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
makeshell.c:331:9: note: here
         case TT_VERSION:
         ^~~~
makeshell.c:337:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
             optionPrintVersion(opts, od);
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
makeshell.c:340:9: note: here
         default:
         ^~~~~~~
makeshell.c: In function ‘genshelloptUsage’:
makeshell.c:887:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
         optionUsage(opts, EXIT_FAILURE);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
makeshell.c:890:5: note: here
     case 0:
     ^~~~
makeshell.c:932:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
         optionUsage(optionParseShellOptions, EXIT_FAILURE);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
makeshell.c:934:5: note: here
     default:
     ^~~~~~~
In file included from libopts.c:34:
numeric.c: In function ‘optionNumericVal’:
numeric.c:139:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
         case 't':  val *= 1000;
                    ~~~~^~~~~~~
numeric.c:140:9: note: here
         case 'g':  val *= 1000;
         ^~~~
numeric.c:140:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
         case 'g':  val *= 1000;
                    ~~~~^~~~~~~
numeric.c:141:9: note: here
         case 'm':  val *= 1000;
         ^~~~
numeric.c:141:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
         case 'm':  val *= 1000;
                    ~~~~^~~~~~~
numeric.c:142:9: note: here
         case 'k':  val *= 1000; break;
         ^~~~
numeric.c:144:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
         case 'T':  val *= 1024;
                    ~~~~^~~~~~~
numeric.c:145:9: note: here
         case 'G':  val *= 1024;
         ^~~~
numeric.c:145:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
         case 'G':  val *= 1024;
                    ~~~~^~~~~~~
numeric.c:146:9: note: here
         case 'M':  val *= 1024;
         ^~~~
numeric.c:146:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
         case 'M':  val *= 1024;
                    ~~~~^~~~~~~
numeric.c:147:9: note: here
         case 'K':  val *= 1024; break;
         ^~~~
  CCLD     libopts.la
libtool: warning: '-version-info/-version-number' is ignored for convenience libraries
ar: `u' modifier ignored since `D'

System (please complete the following information):

• OS: Linux
• Debian 10 (Buster)
• Tcpreplay 4.3.3 Beta1

Additional context

Warning in interface.c:get_interface_list() line 93:
May need to run as root to get access to all network interfaces.
tcpreplay version: 4.3.4-beta2 (build git:v4.3.4-beta1-7-g90c07cfb) (debug)
Copyright 2013-2018 by Fred Klassen <tcpreplay at appneta dot com> - AppNeta
Copyright 2000-2012 by Aaron Turner <aturner at synfin dot net>
The entire Tcpreplay Suite is licensed under the GPLv3
Cache file supported: 04
Not compiled with libdnet.
Compiled against libpcap: 1.8.1
64 bit packet counters: enabled
Verbose printing via tcpdump: enabled
Packet editing: disabled
Fragroute engine: disabled
Default injection method: PF_PACKET send()
Optional injection method: netmap

[fklassen]

Fixed in PR #659