Merge pull request bitcoin#523 from luke-jr/bip43-purposecodes

BIP 43: Reserve purpose codes 10001-19999 for SLIPs

Author: luke-jr

bip-0043.mediawiki

@@ -42,6 +42,8 @@ We encourage different schemes to apply for assigning a separate BIP number
 and use the same number for purpose field, so addresses won't be generated
 from overlapping BIP32 spaces.
 
+Purpose codes from 10001 to 19999 are reserved for [[https://github.com/satoshilabs/slips|SLIPs]].
+
 Example: Scheme described in BIP44 should use 44' (or 0x8000002C) as purpose.
 
 Note that m / 0' / * is already taken by BIP32 (default account), which