Add a simple unix controller

Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>

Makefile.am

@@ -1,6 +1,6 @@
 ACLOCAL_AMFLAGS = -I m4 --install
 
-bin_PROGRAMS = glorytun
+bin_PROGRAMS = glorytun glorytunctl
 
 glorytun_CFLAGS = $(libsodium_CFLAGS)
 glorytun_LDADD = $(libsodium_LIBS)
@@ -9,6 +9,8 @@ glorytun_SOURCES = \
     src/common.c \
     src/ip.h \
     src/str.h \
+    src/ctl.c \
+    src/ctl.h \
     src/main.c \
     src/option.c \
     src/option.h \
@@ -19,6 +21,18 @@ glorytun_SOURCES = \
     mud/mud.h \
     mud/mud.c
 
+glorytunctl_CFLAGS =
+glorytunctl_LDADD =
+glorytunctl_SOURCES = \
+    src/common.h \
+    src/common.c \
+    src/str.h \
+    src/ctl.c \
+    src/ctl.h \
+    src/mainctl.c \
+    src/option.c \
+    src/option.h
+
 EXTRA_DIST = \
     LICENSE \
     README.md \