Fixed some grammar in a few files - #2417

There are lots of problems with your "grammar fixes". I am not sure where to begin:

1. There is nothing wrong with the "Please, always use only valid parameter values so sqlmap could be able to run properly" because ""Could" is used to express possibility or past ability as well as to make suggestions and requests". You are proposing "...so sqlmap will be able to run properly" which doesn't have any sense at all.
2. I don't see a grammar problem with "most probably web server instance hasn't recovered yet" while you are proposing "most probable cause is that, the web server" <- why is here a ','? Also, usage of that in this context is redundant
3. "most probably caused by inability" is ok. Your "most probable cause is by inability" is a grammatical blasphemy
   ...

Four errornous is spelt erroneous.

Five "please wait few minutes" is incorrect grammar, should be "please wait a few minutes"

I mean dude if you want me to call you out on your grammar I will. But don't sit there and tell me I'm wrong when I'm not.

I've changed the "few minutes" to "a few minutes" in 7ea5248

With latest commit changed from "most probably" to "most likely"

I am not going to take any more suggestions from here into the consideration. Thank you