Disable DROPBEAR_SVR_MULTIUSER, because we don't want to be calling

setuid/seteuid sort of stuff (it won't work, and I think sec-comp or
something kills our process).  Also need to disable the sanity check.

dropbear/common-session.c

@@ -68,7 +68,7 @@ void common_session_init(int sock_in, int sock_out) {
 	/* Sets it to lowdelay */
 	update_channel_prio();
 
-#if !DROPBEAR_SVR_MULTIUSER
+#if 0 && !DROPBEAR_SVR_MULTIUSER
 	/* A sanity check to prevent an accidental configuration option
 	   leaving multiuser systems exposed */
 	errno = 0;

dropbear/localoptions.h

@@ -297,3 +297,5 @@ be overridden at runtime with -I. 0 disables idle timeouts */
 
 /* The default path. This will often get replaced by the shell */
 #define DEFAULT_PATH "/sbin:/system/sbin:/system/bin:/system/xbin"
+
+#define DROPBEAR_SVR_MULTIUSER 0

dropbear/svr-chansession.c

@@ -961,7 +961,7 @@ static void execchild(const void *user_data) {
 #endif /* DEBUG_VALGRIND */
 #endif
 
-#if 0 /* DROPBEAR_SVR_MULTIUSER */
+#if DROPBEAR_SVR_MULTIUSER
 	/* We can only change uid/gid as root ... */
 	if (getuid() == 0) {