gnupg2: add "ldap" build option

srcpkgs/gnupg2/template

@@ -1,12 +1,13 @@
 # Template file for 'gnupg2'
 pkgname=gnupg2
 version=2.2.17
-revision=1
+revision=2
 wrksrc="gnupg-${version}"
 build_style=gnu-configure
 configure_args="--with-libgcrypt-prefix=${XBPS_CROSS_BASE}
  --with-ksba-prefix=${XBPS_CROSS_BASE} --with-npth-prefix=${XBPS_CROSS_BASE}
- --with-libassuan-prefix=${XBPS_CROSS_BASE} --enable-gpg-is-gpg2"
+ --with-libassuan-prefix=${XBPS_CROSS_BASE} --enable-gpg-is-gpg2
+ $(vopt_enable ldap)"
 hostmakedepends="pkg-config"
 makedepends="bzip2-devel gnutls-devel libassuan-devel libcurl-devel
  libksba-devel libldap-devel libusb-compat-devel npth-devel sqlite-devel"
@@ -17,6 +18,8 @@ license="GPL-3.0-or-later"
 homepage="https://www.gnupg.org/"
 distfiles="https://gnupg.org/ftp/gcrypt/gnupg/gnupg-${version}.tar.bz2"
 checksum=afa262868e39b651a2db4c071fba90415154243e83a830ca00516f9a807fd514
+build_options="ldap"
+build_options_default="ldap"
 
 pre_configure() {
 	vsed -i '/examples\/systemd-user/d' doc/Makefile.in