License change

MIT -> PD

bsip-0021.md

@@ -107,7 +107,7 @@ for each asset_holder in coin_age_hashmap {
 
 # Copyright
 
-N/A - Consider this BSIP entirely open-source/MIT-licensed, I am not the originator of the concept of 'coin-age' (several proof-of-stake cryptocurrencies make use of coin-age for finding stakable coins).
+This document is placed in the public domain.
 
 # See Also
 * [List account balances - Graphene documentation](http://docs.bitshares.org/api/database.html#id8)

bsip-0022.md

@@ -119,7 +119,7 @@ Please do raise your concerns, propose improvements and engage in the BSIP creat
 
 # Copyright
 
-This document is placed in the public domain, 100% open source & should be considered MIT licensed.
+This document is placed in the public domain.
 
 # See Also
 

bsip-0023.md

@@ -651,7 +651,7 @@ The Bitshares starship drops out of hyperspace in planet Bitcoin's orbit, the cr
 
 # Copyright
 
-This document is placed in the public domain, 100% open source & should be considered MIT licensed.
+This document is placed in the public domain.
 
 # See Also
 

bsip-0024.md

@@ -62,7 +62,7 @@ Would there even be a difference in voting behaviour betwen the two? Perhaps it
 
 # Copyright
 
-This document is placed in the public domain, 100% open source & should be considered MIT licensed.
+This document is placed in the public domain.
 
 # See Also
 

bsip-0045.md

@@ -78,7 +78,7 @@ This flag could only work as long as no MPA has already selected the asset as it
 
 # Copyright
 
-This document is placed in the public domain, 100% open source & should be considered MIT licensed.
+This document is placed in the public domain.
 
 # See Also