Log Message:
Update to Botan 1.8.13:

* 1.8.13, 2011-07-02
 - A race in Algorithm_Factory that could cause crashes in multithreaded
   code has been fixed.

* 1.8.12, 2011-06-20
 - If EMSA3(Raw) was used for more than one signature, it would produce
   incorrect output.
 - Fix the --enable-debug option to configure.py
 - Improve OS detection on Cygwin
 - Fix compilation under Sun Studio 12 on Solaris
 - Fix a memory leak in the constructors of DataSource_Stream and
   DataSink_Stream which would occur if opening the file failed. PR 144

* 1.8.11, 2010-11-02
 - Fix a number of CRL encoding and decoding bugs
 - When building a debug library under VC++, use the debug runtime
 - Fix compilation under Sun Studio on Linux and Solaris
 - Add several functions for compatability with 1.9
 - In the examples, read most input files as binary
 - The Perl build script has been removed in this release

* 1.8.10, 2010-08-31
 - Switch default PKCS #8 encryption algorithm from 3DES to AES-256
 - Increase default hash iterations from 2048 to 10000 in PBES1 and
PBES2
 - Use small tables in the first round of AES
 - Add PBKDF typedef and get_pbkdf for better compatability with 1.9
 - Add version of S2K::derive_key taking salt and iteration count
 - Enable the /proc-walking entropy source on NetBSD
 - Fix the doxygen makefile target

* 1.8.9, 2010-06-16
 - Use constant time multiplication in IDEA
 - Avoid possible timing attack against OAEP decoding
 - Add new X509::BER_encode and PKCS8::BER_encode
 - Enable DLL builds under Windows
 - Add Win32 installer support
 - Add support for the Clang compiler
 - Fix problem in semcem.h preventing build under Clang or GCC 3.4
 - Fix bug that prevented creation of DSA groups under 1024 bits
 - Fix crash in GMP_Engine if library is shutdown and reinitialized
 - Work around problem with recent binutils in x86-64 SHA-1
 - The Perl build script is no longer supported and refuses to run by
   default

* 1.8.8, 2009-11-03
 - Alter Skein-512 to match the tweaked 1.2 specification
 - Fix use of inline asm for access to x86 bswap function
 - Allow building the library without AES enabled
 - Add 'powerpc64' alias to ppc64 arch for Gentoo ebuild