Fix typos in documentation

Author: melvo

src/client/QXmppClientExtension.cpp

@@ -73,7 +73,7 @@ bool QXmppClientExtension::handleStanza(const QDomElement &)
 /// stanzas.
 ///
 /// \param stanza The DOM element to be handled.
-/// \param e2eeMetadata If the element has been decrypted this contains metdata
+/// \param e2eeMetadata If the element has been decrypted this contains metadata
 /// about the encryption.
 ///
 /// \return You should return true if the stanza was handled and no further

src/client/QXmppE2eeExtension.cpp

@@ -47,7 +47,7 @@
 /// Encrypts a QXmppMessage and returns the serialized XML stanza with encrypted
 /// contents via QFuture.
 ///
-/// If the message cannot be encrypted for whatever reason you can either
+/// If the message cannot be encrypted for whatever reason, you can either
 /// serialize the message unencrypted and return that or return a SendError with
 /// an error message.
 ///
@@ -58,7 +58,7 @@
 /// Encrypts a QXmppIq and returns the serialized XML stanza with encrypted
 /// contents via QFuture.
 ///
-/// If the IQ cannot be encrypted for whatever reason you can either serialize
+/// If the IQ cannot be encrypted for whatever reason, you can either serialize
 /// the IQ unencrypted and return that or return a SendError with an error
 /// message.
 ///