[PATCH] Fix nsenter option parsing

[Thomas Lidén]

Usage: nsenter [OPTIONS] [PROG [ARGS]]
Stop nsenter from processing ARGS to PROG as OPTIONS.
e.g. "nsenter ls -l" gives: invalid option -- 'l'

diff --git a/util-linux/nsenter.c b/util-linux/nsenter.c
index c48dcf885..9cfbf21e4 100644
--- a/util-linux/nsenter.c
+++ b/util-linux/nsenter.c
@@ -103,8 +103,9 @@ static const struct namespace_descr ns_list[] = {
 };
 /*
  * Upstream nsenter doesn't support the short option for --preserve-credentials
+ * "+": stop on first non-option
  */
-static const char opt_str[] ALIGN1 = "U::i::u::n::p::m::""t:+S:+G:+r::w::F";
+static const char opt_str[] ALIGN1 = "+""U::i::u::n::p::m::""t:+S:+G:+r::w::F";
 
 #if ENABLE_LONG_OPTS
 static const char nsenter_longopts[] ALIGN1 =