MAINT-5011: Derive remaining exception classes from std::exception.

In particular:
NotImplemented in llhttpnode.cpp
RelocateError in llupdateinstaller.cpp
LLProtectedDataException, LLCertException and subclasses in llsecapi.h

Had to add no-throw destructor overrides to LLCertException and subclasses
because otherwise clang complains that the implicitly-generated destructor's
exception specification is more lax than the base class's.

indra/llmessage/llhttpnode.cpp

@@ -31,6 +31,7 @@
 
 #include "llstl.h"
 #include "llhttpconstants.h"
+#include <stdexcept>
 
 const std::string CONTEXT_HEADERS("headers");
 const std::string CONTEXT_PATH("path");
@@ -92,8 +93,9 @@ LLHTTPNode::~LLHTTPNode()
 
 
 namespace {
-	class NotImplemented
+	struct NotImplemented: public std::runtime_error
 	{
+		NotImplemented(): std::runtime_error("LLHTTPNode::NotImplemented") {}
 	};
 }
 

indra/newview/llsecapi.cpp

@@ -69,7 +69,7 @@ void initializeSecHandler()
 	}
 	if (!exception_msg.empty())  // an exception was thrown.
 	{
-		throw LLProtectedDataException(exception_msg.c_str());
+		throw LLProtectedDataException(exception_msg);
 	}
 
 }

indra/newview/llsecapi.h

@@ -32,6 +32,7 @@
 #include <openssl/x509.h>
 #include <ostream>
 #include "llpointer.h"
+#include <stdexcept>
 
 #ifdef LL_WINDOWS
 #pragma warning(disable:4250)
@@ -116,17 +117,14 @@
 
 
 
-class LLProtectedDataException
+struct LLProtectedDataException: public std::runtime_error
 {
-public:
-	LLProtectedDataException(const char *msg) 
+	LLProtectedDataException(const std::string& msg):
+		std::runtime_error(msg)
 	{
-		LL_WARNS("SECAPI") << "Protected Data Error: " << (std::string)msg << LL_ENDL;
-		mMsg = (std::string)msg;
+		LL_WARNS("SECAPI") << "Protected Data Error: " << msg << LL_ENDL;
 	}
-	std::string getMessage() { return mMsg; }
-protected:
-	std::string mMsg;
+	std::string getMessage() { return what(); }
 };
 
 // class LLCertificate
@@ -334,22 +332,22 @@ std::ostream& operator <<(std::ostream& s, const LLCredential& cred);
 
 // All error handling is via exceptions.
 
-class LLCertException
+class LLCertException: public std::runtime_error
 {
 public:
-	LLCertException(LLPointer<LLCertificate> cert, const char* msg)
+	LLCertException(LLPointer<LLCertificate> cert, const std::string& msg):
+		std::runtime_error(msg)
 	{
 
 		mCert = cert;
 
-		LL_WARNS("SECAPI") << "Certificate Error: " << (std::string)msg << LL_ENDL;
-		mMsg = (std::string)msg;
+		LL_WARNS("SECAPI") << "Certificate Error: " << msg << LL_ENDL;
 	}
+	virtual ~LLCertException() throw() {}
 	LLPointer<LLCertificate> getCert() { return mCert; }
-	std::string getMessage() { return mMsg; }
+	std::string getMessage() { return what(); }
 protected:
 	LLPointer<LLCertificate> mCert;
-	std::string mMsg;
 };
 
 class LLInvalidCertificate : public LLCertException
@@ -358,6 +356,7 @@ public:
 	LLInvalidCertificate(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertInvalid")
 	{
 	}
+	virtual ~LLInvalidCertificate() throw() {}
 protected:
 };
 
@@ -367,6 +366,7 @@ public:
 	LLCertValidationTrustException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertUntrusted")
 	{
 	}
+	virtual ~LLCertValidationTrustException() throw() {}
 protected:
 };
 
@@ -378,7 +378,7 @@ public:
 	{
 		mHostname = hostname;
 	}
-	
+	virtual ~LLCertValidationHostnameException() throw() {}
 	std::string getHostname() { return mHostname; }
 protected:
 	std::string mHostname;
@@ -392,6 +392,7 @@ public:
 	{
 		mTime = current_time;
 	}
+	virtual ~LLCertValidationExpirationException() throw() {}
 	LLDate GetTime() { return mTime; }
 protected:
 	LLDate mTime;
@@ -403,6 +404,7 @@ public:
 	LLCertKeyUsageValidationException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertKeyUsage")
 	{
 	}
+	virtual ~LLCertKeyUsageValidationException() throw() {}
 protected:
 };
 
@@ -412,6 +414,7 @@ public:
 	LLCertBasicConstraintsValidationException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertBasicConstraints")
 	{
 	}
+	virtual ~LLCertBasicConstraintsValidationException() throw() {}
 protected:
 };
 
@@ -421,6 +424,7 @@ public:
 	LLCertValidationInvalidSignatureException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertInvalidSignature")
 	{
 	}
+	virtual ~LLCertValidationInvalidSignatureException() throw() {}
 protected:
 };
 

indra/viewer_components/updater/llupdateinstaller.cpp

@@ -35,12 +35,14 @@
 #pragma warning(disable: 4702)      // disable 'unreachable code' so we can use lexical_cast (really!).
 #endif
 #include <boost/lexical_cast.hpp>
-
+#include <stdexcept>
 
 namespace {
-	class RelocateError {};
-	
-	
+	struct RelocateError: public std::runtime_error
+	{
+		RelocateError(): std::runtime_error("llupdateinstaller: RelocateError") {}
+	};
+
 	std::string copy_to_temp(std::string const & path)
 	{
 		std::string scriptFile = gDirUtilp->getBaseFileName(path);