package/pure-ftpd: bump version to 1.0.51

Changelog: https://github.com/jedisct1/pure-ftpd/blob/master/ChangeLog

Updated copyright hash due to copyright year bump:
https://github.com/jedisct1/pure-ftpd/commit/cf1a9705c63ebc62735f99d4acf6dba117288abe

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/pure-ftpd/pure-ftpd.hash

@@ -1,3 +1,3 @@
 # Locally calculated after checking pgp signature
-sha256  6722c7fd09fe3c9ebbd572f3d097087ec7b32aacb3df8fa3400d4c07e4f377d7  pure-ftpd-1.0.50.tar.bz2
-sha256  c1be5d56c28927b05131d7384bd522af4b11c3afea45725f5ca7983c11db61ac  COPYING
+sha256  622360b86c60b563abe0e994f0a86cfe5ccfde597b29a14b0a79b6e5aa05a304  pure-ftpd-1.0.51.tar.bz2
+sha256  88c813191c1a59213c641e322cf4562618ab0116ddd7c8341c419f8863b8b0a9  COPYING

package/pure-ftpd/pure-ftpd.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PURE_FTPD_VERSION = 1.0.50
+PURE_FTPD_VERSION = 1.0.51
 PURE_FTPD_SITE = https://download.pureftpd.org/pub/pure-ftpd/releases
 PURE_FTPD_SOURCE = pure-ftpd-$(PURE_FTPD_VERSION).tar.bz2
 PURE_FTPD_LICENSE = ISC