doc: Bump manpages pre-final

No changes, only the month changed from July to August.

Tree-SHA512: c8f672f3a6e570ea1feda2c2f17d30da8a04b705d990bf5aec8e09da5937f3f9a608f4f50941f183c536a4158001b13d149bd0c873a24eae48ae57d96cd274c8

doc/man/bitcoin-cli.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.6.
-.TH BITCOIN-CLI "1" "July 2019" "bitcoin-cli v0.18.1.0" "User Commands"
+.TH BITCOIN-CLI "1" "August 2019" "bitcoin-cli v0.18.1.0" "User Commands"
 .SH NAME
 bitcoin-cli \- manual page for bitcoin-cli v0.18.1.0
 .SH SYNOPSIS

doc/man/bitcoin-qt.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.6.
-.TH BITCOIN-QT "1" "July 2019" "bitcoin-qt v0.18.1.0" "User Commands"
+.TH BITCOIN-QT "1" "August 2019" "bitcoin-qt v0.18.1.0" "User Commands"
 .SH NAME
 bitcoin-qt \- manual page for bitcoin-qt v0.18.1.0
 .SH SYNOPSIS

doc/man/bitcoin-tx.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.6.
-.TH BITCOIN-TX "1" "July 2019" "bitcoin-tx v0.18.1.0" "User Commands"
+.TH BITCOIN-TX "1" "August 2019" "bitcoin-tx v0.18.1.0" "User Commands"
 .SH NAME
 bitcoin-tx \- manual page for bitcoin-tx v0.18.1.0
 .SH SYNOPSIS

doc/man/bitcoin-wallet.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.6.
-.TH BITCOIN-WALLET "1" "July 2019" "bitcoin-wallet v0.18.1.0" "User Commands"
+.TH BITCOIN-WALLET "1" "August 2019" "bitcoin-wallet v0.18.1.0" "User Commands"
 .SH NAME
 bitcoin-wallet \- manual page for bitcoin-wallet v0.18.1.0
 .SH DESCRIPTION

doc/man/bitcoind.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.6.
-.TH BITCOIND "1" "July 2019" "bitcoind v0.18.1.0" "User Commands"
+.TH BITCOIND "1" "August 2019" "bitcoind v0.18.1.0" "User Commands"
 .SH NAME
 bitcoind \- manual page for bitcoind v0.18.1.0
 .SH SYNOPSIS