fix(main/dropbear): don't handle motd internally

MOTD will be shown by Termux login utility.

Fixes termux/termux-packages#16684

packages/dropbear/build.sh

@@ -3,6 +3,7 @@ TERMUX_PKG_DESCRIPTION="Small SSH server and client"
 TERMUX_PKG_LICENSE="MIT"
 TERMUX_PKG_MAINTAINER="@termux"
 TERMUX_PKG_VERSION=2022.83
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=https://matt.ucc.asn.au/dropbear/releases/dropbear-${TERMUX_PKG_VERSION}.tar.bz2
 TERMUX_PKG_SHA256=bc5a121ffbc94b5171ad5ebe01be42746d50aa797c9549a4639894a16749443b
 TERMUX_PKG_DEPENDS="termux-auth, zlib"

packages/dropbear/default_options.h.patch

@@ -1,5 +1,6 @@
---- a/default_options.h
-+++ b/default_options.h
+diff -uNr dropbear-2022.83/default_options.h dropbear-2022.83.mod/default_options.h
+--- dropbear-2022.83/default_options.h	2022-11-14 16:30:00.000000000 +0200
++++ dropbear-2022.83.mod/default_options.h	2023-05-22 23:19:08.878747850 +0300
 @@ -13,7 +13,7 @@
 
  IMPORTANT: Some options will require "make clean" after changes */
@@ -24,7 +25,7 @@
 
  /* Set NON_INETD_MODE if you require daemon functionality (ie Dropbear listens
   * on chosen ports and keeps accepting connections. This is the default.
-@@ -45,7 +45,7 @@
+@@ -57,7 +57,7 @@
   * several kB in binary size however will make the symmetrical ciphers and hashes
   * slower, perhaps by 50%. Recommended for small systems that aren't doing
   * much traffic. */
@@ -33,16 +34,18 @@
 
  /* Enable X11 Forwarding - server only */
  #define DROPBEAR_X11FWD 0
-@@ -189,7 +189,7 @@
+@@ -218,8 +218,8 @@
+ #define DO_HOST_LOOKUP 0
 
  /* Whether to print the message of the day (MOTD). */
- #define DO_MOTD 1
+-#define DO_MOTD 1
 -#define MOTD_FILENAME "/etc/motd"
++#define DO_MOTD 0
 +#define MOTD_FILENAME "@TERMUX_PREFIX@/etc/motd"
 
  /* Authentication Types - at least one required.
     RFC Draft requires pubkey auth, and recommends password */
-@@ -213,7 +213,7 @@
+@@ -244,7 +244,7 @@
  /* Set this to 0 if your system does not have multiple user support.
     (Linux kernel CONFIG_MULTIUSER option)
     The resulting binary will not run on a normal system. */
@@ -51,7 +54,7 @@
 
  /* Client authentication options */
  #define DROPBEAR_CLI_PASSWORD_AUTH 1
-@@ -241,7 +241,7 @@
+@@ -273,7 +273,7 @@
 
  /* Set this to use PRNGD or EGD instead of /dev/urandom */
  #define DROPBEAR_USE_PRNGD 0
@@ -60,7 +63,7 @@
 
  /* Specify the number of clients we will allow to be connected but
   * not yet authenticated. After this limit, connections are rejected */
-@@ -285,11 +285,11 @@
+@@ -298,11 +298,11 @@
   * scripts etc. This can be overridden with the -P flag.
   * Homedir is prepended if path begins with ~/
   */
@@ -74,7 +77,7 @@
 
 
  /* If you want to enable running an sftp server (such as the one included with
-@@ -298,11 +298,11 @@
+@@ -311,11 +311,11 @@
   * Homedir is prepended if path begins with ~/
   */
  #define DROPBEAR_SFTPSERVER 1
@@ -88,7 +91,7 @@
 
  /* Whether to log commands executed by a client. This only logs the 
   * (single) command sent to the server, not what a user did in a 
-@@ -338,7 +338,7 @@
+@@ -351,7 +351,7 @@
  #define DEFAULT_IDLE_TIMEOUT 0
 
  /* The default path. This will often get replaced by the shell */