[Merchants] Add Merchant Data Bucket capability. (#2160)

* [Merchants] Add Merchant Data Bucket capability.
- Allows server operators to limit merchant items based on data bucket values and comparisons.
- Adds 3 columns, bucket_name, bucket_value, and bucket_comparison to merchantlist table.
- Bucket is checked based on GetBucketKey()-bucket_name.
- Buckets are mass loaded when using the merchant so it's not a database call per item, just a grouping of all their buckets from the start.
- This is a nearly year old pull request redone for master.
- bucket_comparison Values are as follows:
        - bucket_comparison 0: bucket_name == bucket_value
        - bucket_comparison 1: bucket_name != bucket_value
        - bucket_comparison 2: bucket_name >= bucket_value
        - bucket_comparison 3: bucket_name <= bucket_value
        - bucket_comparison 4: bucket_name > bucket_value
        - bucket_comparison 5: bucket_name < bucket_value
        - bucket_comparison 6: bucket_name is any of  pipe(|)-separated bucket_value
        - bucket_comparison 7: bucket_name is not any of  pipe(|)-separated bucket_value
        - bucket_comparison 8: bucket_name is between first and second value of pipe(|)-separated bucket_value
        - bucket_comparison 9: bucket_name is not between first and second value of pipe(|)-separated  bucket_value

* Revert query change.

common/eq_packet_structs.h

@@ -3621,14 +3621,17 @@ struct LevelAppearance_Struct { //Sends a little graphic on level up
 };
 
 struct MerchantList {
-	uint32	id;
-	uint32	slot;
-	uint32	item;
-	int16	faction_required;
-	int8	level_required;
-	uint16	alt_currency_cost;
-	uint32	classes_required;
-	uint8	probability;
+	uint32 id;
+	uint32 slot;
+	uint32 item;
+	int16 faction_required;
+	int8 level_required;
+	uint16 alt_currency_cost;
+	uint32 classes_required;
+	uint8 probability;
+	std::string bucket_name;
+	std::string bucket_value;
+	uint8 bucket_comparison; 
 };
 
 struct TempMerchantList {