Update license header and scripts (#8666)

* Update `add_license` script

* run script

* add `remove duplicate lines script` and run it

* Revert changes `English spaces`

* strip whitespaces

* Revert `GPL` in files with `apache/mit license`

* don't append `gpl license` in files with other lic

* Don't append `gpl header` in files with other lic.

* re-ran script

* include c and cpp files too

* remove duplicate header

* rebase nit

util/rlp/src/rlpin.rs

@@ -281,7 +281,6 @@ impl<'a, 'view> Rlp<'a> where 'a: 'view {
 		Ok(result)
 	}
 
-
 	/// consumes slice prefix of length `len`
 	fn consume(bytes: &'a [u8], len: usize) -> Result<&'a [u8], DecoderError> {
 		match bytes.len() >= len {

util/rlp/src/stream.rs

@@ -133,7 +133,6 @@ impl RlpStream {
 		self
 	}
 
-
 	/// Declare appending the list of unknown size, chainable.
 	pub fn begin_unbounded_list(&mut self) -> &mut RlpStream {
 		self.finished_list = false;
@@ -206,7 +205,6 @@ impl RlpStream {
 		base_size
 	}
 
-
 	/// Returns current RLP size in bytes for the data pushed into the list.
 	pub fn len<'a>(&'a self) -> usize {
 		self.estimate_size(0)