Remove algo factory, engines, global RNG, global state, etc.

Convert all uses of Algorithm_Factory and the engines to using Algo_Registry

The shared pool of entropy sources remains but is moved to EntropySource.
With that and few remaining initializations (default OIDs and aliases)
moved elsewhere, the global state is empty and init and shutdown are no-ops.
Remove almost all of the headers and code for handling the global
state, except LibraryInitializer which remains as a compatability stub.

Update seeding for blinding so only one hacky almost-global RNG
instance needs to be setup instead of across all pubkey uses (it uses
either the system RNG or an AutoSeeded_RNG if the system RNG is not
available).

1 files changed, 4 insertions, 8 deletions

diff --git a/doc/relnotes/1_11_14.rst b/doc/relnotes/1_11_14.rst
index d8004f512..71787db07 100644
--- a/doc/relnotes/1_11_14.rst
+++ b/doc/relnotes/1_11_14.rst
@@ -1,6 +1,10 @@
 Version 1.11.14, Not Yet Released
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+* The global state object previously used by the library has been
+  removed and no form of initialization is required to use the library.
+  LibraryInitializer remains as a stub.
+
 * OCB mode, which provides a fast and constant time AEAD mode without
   requiring hardware support, is now supported in TLS, following
   draft-zauner-tls-aes-ocb-01. Because this specification is not yet
@@ -16,11 +20,3 @@ Version 1.11.14, Not Yet Released
   Previously the allocator would consume all available mlocked memory,
   this allows botan to coexist with an application which wants to
   mlock memory of its own.
-
-* The library can now only be initialized once. If the library is
-  already initialized and a LibraryInitializer is created, it has no
-  effect. If the first library initializer leaves scope then a new
-  initializer can be created.
-
-  LibraryInitializer can now only be used in an RAII fashion; the
-  static `initialize` and `deinitialize` functions have been removed.