Merge pull request bitcoin#860 from azuchi/fix-wrong-description-bip174

BIP174: Fix wrong description about Proprietary Use Type

Author: luke-jr

bip-0174.mediawiki

@@ -132,7 +132,7 @@ The currently defined global types are as follows:
 ** Value: The 32-bit little endian unsigned integer representing the version number of this PSBT. If ommitted, the version number is 0.
 *** <tt>{32-bit uint}</tt>
 
-* Type: Version Number <tt>PSBT_GLOBAL_PROPRIETARY = 0xFC</tt>
+* Type: Proprietary Use Type <tt>PSBT_GLOBAL_PROPRIETARY = 0xFC</tt>
 ** Key: Variable length identifier prefix, followed by a subtype, followed by the key data itself.
 *** <tt>{0xFC}|<prefix>|{subtype}|{key data}</tt>
 ** Value: Any value data as defined by the proprietary type user.
@@ -200,7 +200,7 @@ The currently defined per-input types are defined as follows:
 ** Value: The UTF-8 encoded commitment message string for the proof-of-reserves.  See [[bip-0127.mediawiki|BIP 127]] for more information.
 *** <tt>{porCommitment}</tt>
 
-* Type: Version Number <tt>PSBT_INPUT_PROPRIETARY = 0xFC</tt>
+* Type: Proprietary Use Type <tt>PSBT_INPUT_PROPRIETARY = 0xFC</tt>
 ** Key: Variable length identifier prefix, followed by a subtype, followed by the key data itself.
 *** <tt>{0xFC}|<prefix>|{subtype}|{key data}</tt>
 ** Value: Any value data as defined by the proprietary type user.
@@ -228,7 +228,7 @@ determine which outputs are change outputs and verify that the change is returni
 ** Value: The master key fingerprint concatenated with the derivation path of the public key. The derivation path is represented as 32-bit little endian unsigned integer indexes concatenated with each other. Public keys are those needed to spend this output.
 *** <tt>{master key fingerprint}|{32-bit uint}|...|{32-bit uint}</tt>
 
-* Type: Version Number <tt>PSBT_OUTPUT_PROPRIETARY = 0xFC</tt>
+* Type: Proprietary Use Type <tt>PSBT_OUTPUT_PROPRIETARY = 0xFC</tt>
 ** Key: Variable length identifier prefix, followed by a subtype, followed by the key data itself.
 *** <tt>{0xFC}|<prefix>|{subtype}|{key data}</tt>
 ** Value: Any value data as defined by the proprietary type user.