Add chacha20 option and AES-NI negotiation

.build.sh

@@ -4,10 +4,10 @@ export CC="gcc -static"
 
 git clone https://github.com/jedisct1/libsodium --depth=1 --branch stable
 cd libsodium || exit 1
-./autogen.sh && ./configure CFLAGS=-flto LDFLAGS=-flto --enable-minimal --disable-shared --prefix=/usr && make install
+./autogen.sh && ./configure --enable-minimal --disable-shared --prefix=/usr && make install
 cd ..
 
-./autogen.sh && ./configure CFLAGS=-flto LDFLAGS=-flto && make
+./autogen.sh && ./configure && make
 [ -x glorytun ] || exit 1
 
 mkdir -p deploy

src/main.c

@@ -268,6 +268,7 @@ int main (int argc, char **argv)
         { "time-tolerance", &time_tolerance, option_long   },
         { "v4only",         NULL,            option_option },
         { "v6only",         NULL,            option_option },
+        { "chacha20",       NULL,            option_option },
         { "version",        NULL,            option_option },
         { NULL },
     };
@@ -317,7 +318,9 @@ int main (int argc, char **argv)
 
     fd_set_nonblock(tun_fd);
 
-    struct mud *mud = mud_create(bind_port, v4, v6);
+    int chacha = option_is_set(opts, "chacha20");
+
+    struct mud *mud = mud_create(bind_port, v4, v6, !chacha);
 
     if (!mud) {
         gt_log("couldn't create mud\n");