Move into version control

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diff --git a/src/armadillo/include/armadillo_bits/fn_qz.hpp b/src/armadillo/include/armadillo_bits/fn_qz.hpp
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+// SPDX-License-Identifier: Apache-2.0
+// 
+// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
+// Copyright 2008-2016 National ICT Australia (NICTA)
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ------------------------------------------------------------------------
+
+
+//! \addtogroup fn_qz
+//! @{
+
+
+
+//! QZ decomposition for pair of N-by-N general matrices A and B
+template<typename T1, typename T2>
+inline
+typename
+enable_if2
+  <
+  is_supported_blas_type<typename T1::elem_type>::value,
+  bool
+  >::result
+qz
+  (
+         Mat<typename T1::elem_type>&    AA,
+         Mat<typename T1::elem_type>&    BB,
+         Mat<typename T1::elem_type>&    Q,
+         Mat<typename T1::elem_type>&    Z,
+  const Base<typename T1::elem_type,T1>& A_expr,
+  const Base<typename T1::elem_type,T2>& B_expr,
+  const char*                            select = "none"
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  const char sig = (select != nullptr) ? select[0] : char(0);
+  
+  arma_debug_check( ( (sig != 'n') && (sig != 'l') && (sig != 'r') && (sig != 'i') && (sig != 'o') ), "qz(): unknown select form" );
+  
+  const bool status = auxlib::qz(AA, BB, Q, Z, A_expr.get_ref(), B_expr.get_ref(), sig);
+  
+  if(status == false)
+    {
+    AA.soft_reset();
+    BB.soft_reset();
+    Q.soft_reset();
+    Z.soft_reset();
+    arma_debug_warn_level(3, "qz(): decomposition failed");
+    }
+  
+  return status;
+  }
+
+
+
+//! @}