SL-14597 ensure that uris don't crash viewer

indra/llcommon/lluriparser.cpp

@@ -162,6 +162,11 @@ S32 LLUriParser::normalize()
 {
 	mNormalizedTmp = mTmpScheme;
 	if (!mRes)
+	{
+        // Uriparser is 3p software we can not directly fix.
+        // On winodws this probably requires SEH handling, but all
+        // crashes so far were on MAC in scope of uriNormalizeSyntaxExA.
+        try
         {
             mRes = uriNormalizeSyntaxExA(&mUri, URI_NORMALIZE_SCHEME | URI_NORMALIZE_HOST);
 
@@ -184,6 +189,12 @@ S32 LLUriParser::normalize()
                 }
             }
         }
+        catch (...)
+        {
+            // At this point mNormalizedUri should contain http+unmodified input string.
+            LL_WARNS() << "Uriparser crashed processing: " << mNormalizedUri << LL_ENDL;
+        }
+	}
 
 	if(mTmpScheme)
 	{