proftpd: update to 1.3.7.

Closes: #25175 [via git-merge-pr]

srcpkgs/proftpd/patches/cross.patch

@@ -1,11 +0,0 @@
---- lib/libcap/Makefile	2017-04-10 04:31:02.000000000 +0200
-+++ -	2018-08-28 19:50:14.092251299 +0200
-@@ -26,7 +26,7 @@
- all: $(LIBNAME)
- 
- _makenames: _makenames.c cap_names.sed
--	$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
-+	$(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) $(LDFLAGS_FOR_BUILD) $< -o $@
- 
- cap_names.h: _makenames
- 	./_makenames > cap_names.h

srcpkgs/proftpd/template

@@ -1,18 +1,16 @@
 # Template file for 'proftpd'
 pkgname=proftpd
-version=1.3.6
-revision=2
-_gitrev=8af87f881d6e74bd9ec66899679d3bff3faabf71
-wrksrc="proftpd-${_gitrev}"
+version=1.3.7
+revision=1
 build_style=gnu-configure
 makedepends="libcap-devel"
 short_desc="Highly configurable GPL-licensed FTP server software"
 maintainer="John <me@johnnynator.dev>"
 license="GPL-3.0-or-later"
-changelog="https://github.com/proftpd/proftpd/blob/${version}/RELEASE_NOTES"
 homepage="http://www.proftpd.org/"
-distfiles="https://github.com/proftpd/proftpd/archive/${_gitrev}.tar.gz"
-checksum=20a9c607c38a9811e52032870a0f008bbfe836afce5575fb65c4afddb7dde04c
+changelog="https://github.com/proftpd/proftpd/blob/${version}/RELEASE_NOTES"
+distfiles="https://github.com/proftpd/proftpd/archive/v${version}.tar.gz"
+checksum=9aee9aafc0f22390d2c5371beed615bc366e2699a2426ddd9631f9510c3576b7
 conf_files="/etc/proftpd.conf"
 
 proftpd-devel_package() {