Add accessors for the build-time version of openssl.

Many bugs originate due to mismatches between the build-time and
run-time versions of openssl but they're hard to debug as we don't
provide access to the build-time info. This addresses that weakness.

[ChangeLog][QtNetwork][QSslSocket] Added accessors for the version
of openssl used at build-time. This will help when debugging
problems caused by a mismatch with the run-time version.

Change-Id: I6a4c21c8f16ab4c90cdf166f38c62fe37bf1f165
Reviewed-by: Peter Hartmann <phartmann@blackberry.com>

src/network/ssl/qsslsocket.cpp

@@ -1679,6 +1679,32 @@ QString QSslSocket::sslLibraryVersionString()
     return QSslSocketPrivate::sslLibraryVersionString();
 }
 
+/*!
+    \since 5.4
+    Returns the version number of the SSL library in use at compile
+    time. If no SSL support is available then this will return an
+    undefined value.
+
+    \sa sslLibraryVersionNumber()
+*/
+long QSslSocket::sslLibraryBuildVersionNumber()
+{
+    return QSslSocketPrivate::sslLibraryBuildVersionNumber();
+}
+
+/*!
+    \since 5.4
+    Returns the version string of the SSL library in use at compile
+    time. If no SSL support is available then this will return an
+    empty value.
+
+    \sa sslLibraryVersionString()
+*/
+QString QSslSocket::sslLibraryBuildVersionString()
+{
+    return QSslSocketPrivate::sslLibraryBuildVersionString();
+}
+
 /*!
     Starts a delayed SSL handshake for a client connection. This
     function can be called when the socket is in the \l ConnectedState

src/network/ssl/qsslsocket.h

@@ -183,6 +183,8 @@ public:
     static bool supportsSsl();
     static long sslLibraryVersionNumber();
     static QString sslLibraryVersionString();
+    static long sslLibraryBuildVersionNumber();
+    static QString sslLibraryBuildVersionString();
 
     void ignoreSslErrors(const QList<QSslError> &errors);
 

src/network/ssl/qsslsocket_openssl.cpp

@@ -584,6 +584,16 @@ QString QSslSocketPrivate::sslLibraryVersionString()
     return QString::fromLatin1(versionString);
 }
 
+long QSslSocketPrivate::sslLibraryBuildVersionNumber()
+{
+    return OPENSSL_VERSION_NUMBER;
+}
+
+QString QSslSocketPrivate::sslLibraryBuildVersionString()
+{
+    return QLatin1String(OPENSSL_VERSION_TEXT);
+}
+
 /*!
     \internal
 

src/network/ssl/qsslsocket_p.h

@@ -129,6 +129,8 @@ public:
     static bool supportsSsl();
     static long sslLibraryVersionNumber();
     static QString sslLibraryVersionString();
+    static long sslLibraryBuildVersionNumber();
+    static QString sslLibraryBuildVersionString();
     static void ensureInitialized();
     static void deinitialize();
     static QList<QSslCipher> defaultCiphers();