Update head to match stable 1.0

contrib/why-gnupg

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+Why to use GnuPG and not PGP.
+-----------------------------
+
+  * PGP 2 is nearly Free Software but encumbered by the IDEA patent.
+   
+  * PGP 2 is old, hard to maintain and limited to one set of
+    encryption algorithms (RSA + IDEA)
+
+  * PGP 2 is not a GNU or Unix Program and threfore not easy to use in
+    those environments
+
+  * PGP 2 has a couple of minor security flaws 
+
+  * PGP 5 and 6 are more or less OpenPGP conform but proprietray
+    software.  Source code is available but there is no way to be sure
+    that the distributed binary versions do match the source code.
+    Parts of the source code are not published.  It is illegal to
+    build versions of PGP from source and distribute them (IIRC, there
+    is an exception for private users).
+
+  * PGP 5 and 6 are not fullty OpenPGP compliant
+
+  * PGP 7 is claimed to be OpenPGP compliant but the source code is
+    not anymore published.
+
+  * At least versions before 6.5.8 had severe coding bugs.  We don't
+    know about PGP 7.
+
+  * PGP 5, 6 and 7 implement complicated methods for key recovering in
+    corporate environments.  Although this is not a hidden feature,
+    this leads to more code and bugs.
+
+  * NAI as the vendor of PGP seems to be a major government contractor.
+
+  * Given the history of known backdoors in other proprietary software
+    (e.g. Lotus Notes), some folks claim that there might also be
+    backdoors in PGP 5, 6 and 7.  Now there are even more rumors after
+    Phil Zimmermann left NAI.
+
+  * GnuPG is Free Software under the GNU GPL.  It does not use
+    patented algorithms.
+
+  * Everyone is able to scrutinize the source code, build, distribute
+    and use versions of his own or from a trusted party he chooses.
+
+  * The build environment is also Free Software and therefore less
+    likely tampered with malicious code.  The exception here is the MS
+    Windows version of GnuPG where the OS is proprietary.  The binary
+    version however is build using an entirely Free Software OS and
+    toolchain (cross-platfrom development under GNU/Linux).
+
+  * Security fixes are provided very fast.
+
+  * GnuPG is a standard tool in all GNU/Linux systems and used in many
+    different environments.
+
+  * GnuPG gives reasonable messages and not just "Error encrypting".
+
+  * GnuPG supports most of the optional features of the OpenPGP standard.
+
+  * GnuPG comes with internationalization support for 16 languages.
+
+  * Graphical frontends are available and they divert the task of 
+    the actual cryptographic operations to GnuPG as a specialized tool
+    for this.  A library called GPGME is available which makes
+    interfacing of GnuPG with other programs quite easy.
+ 
+  * GnuPG is available for all GNU and Unix platforms as well as for
+    all MS Windows Operating systems.  Porting to VMS, MAC OSX and
+    OS/2 is nearly finished.
+ 
+
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