remove old bundled getopt and use glibc/musl instead
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1,3 +1,3 @@
 ## Process this file with automake to produce Makefile.in
 
-EXTRA_DIST = utf8.h getopt.h i18n.h base64.h picture.h
+EXTRA_DIST = utf8.h i18n.h base64.h picture.h
--- a/share/Makefile.am
+++ b/share/Makefile.am
@@ -2,12 +2,10 @@
 
 AM_CPPFLAGS = -I$(top_srcdir)/include
 
-noinst_LIBRARIES = libutf8.a libgetopt.a libbase64.a libpicture.a
+noinst_LIBRARIES = libutf8.a libbase64.a libpicture.a
 
 libutf8_a_SOURCES = charset.c charset.h iconvert.c utf8.c
 
-libgetopt_a_SOURCES = getopt.c getopt1.c
-
 libbase64_a_SOURCES = base64.c
 
 libpicture_a_SOURCES = picture.c
--- a/configure.ac
+++ b/configure.ac
@@ -193,7 +193,7 @@ fi
 AM_CONDITIONAL(HAVE_LIBOPUSFILE, test "x$HAVE_LIBOPUSFILE" = "xyes")
 
 
-SHARE_LIBS='$(top_builddir)/share/libutf8.a $(top_builddir)/share/libgetopt.a'
+SHARE_LIBS='$(top_builddir)/share/libutf8.a'
 SHARE_CFLAGS='-I$(top_srcdir)/include'
 
 I18N_CFLAGS='-I$(top_srcdir)/intl'