Fixes to Coverity errors:

72662
72702
72724
73397
73410
73414
73422
75424
75748
75789
75938
75939

Also includes a fix to a bug caused by a previous Coverity error change in canonizer.c

query_classifier/test/canonical_tests/canonizer.c

@@ -57,7 +57,7 @@ int main(int argc, char** argv)
 		{
 			fgets(readbuff,4092,infile);
 			psize = strlen(readbuff);
-			if(psize < 0 || > 4092){
+			if(psize < 0 || psize > 4092){
 				continue;
 			}
 			qbuff = gwbuf_alloc(psize + 7);