treewide: Make explicit that 'dev' output of openldap is used

pkgs/applications/networking/instant-messengers/ekiga/default.nix

@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags = [
-    "--with-ldap-dir=${openldap}"
+    "--with-ldap-dir=${openldap.dev}"
     "--with-libsasl2-dir=${cyrus_sasl.dev}"
     "--with-boost-libdir=${boost.out}/lib"
     "--disable-gconf"

pkgs/development/libraries/kerberos/heimdal.nix

@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     "--without-x"
     "--with-berkeley-db=${db}"
   ] ++ optionals (!libOnly) [
-    "--with-openldap=${openldap}"
+    "--with-openldap=${openldap.dev}"
   ] ++ optionals (!stdenv.isFreeBSD) [
     "--with-capng"
   ];

pkgs/servers/monitoring/zabbix/2.2.nix

@@ -47,7 +47,7 @@ in
     ++ stdenv.lib.optional enableJabber "--with-jabber=${minmay}"
     ++ stdenv.lib.optional enableSnmp "--with-net-snmp"
     ++ stdenv.lib.optional enableSsh "--with-ssh2=${libssh2.dev}"
-    ++ stdenv.lib.optional enableLdap "--with-ldap=${openldap}";
+    ++ stdenv.lib.optional enableLdap "--with-ldap=${openldap.dev}";
 
     postPatch = ''
       sed -i -e 's/iksemel/minmay/g' configure src/libs/zbxmedia/jabber.c