Rename the apache config file to match the nginx one

Since both config files end up in /etc/letsencrypt/, if we want the two
plugins be to installable at the same time, their config files need different
names.

MANIFEST.in

@@ -9,7 +9,7 @@ recursive-include acme/schemata *.json
 recursive-include acme/jose/testdata *
 
 recursive-include letsencrypt_apache/tests/testdata *
-include letsencrypt_apache/options-ssl.conf
+include letsencrypt_apache/options-ssl-apache.conf
 
 recursive-include letsencrypt_nginx/tests/testdata *
 include letsencrypt_nginx/options-ssl.conf

letsencrypt_apache/constants.py

@@ -4,7 +4,7 @@ import pkg_resources
 
 CLI_DEFAULTS = dict(
     server_root="/etc/apache2",
-    mod_ssl_conf="/etc/letsencrypt/options-ssl.conf",
+    mod_ssl_conf="/etc/letsencrypt/options-ssl-apache.conf",
     ctl="apache2ctl",
     enmod="a2enmod",
     init_script="/etc/init.d/apache2",
@@ -13,7 +13,7 @@ CLI_DEFAULTS = dict(
 
 
 MOD_SSL_CONF = pkg_resources.resource_filename(
-    "letsencrypt_apache", "options-ssl.conf")
+    "letsencrypt_apache", "options-ssl-apache.conf")
 """Path to the Apache mod_ssl config file found in the Let's Encrypt
 distribution."""