apache: fix build without sslv3

SSLv3 support is deactivated in LEDE now, which causes a build problem
in apache.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

net/apache/patches/006-remove-ssl3.patch

@@ -0,0 +1,13 @@
+--- a/support/ab.c
++++ b/support/ab.c
+@@ -2232,8 +2232,10 @@ int main(int argc, const char * const ar
+                 } else if (strncasecmp(optarg, "SSL2", 4) == 0) {
+                     meth = SSLv2_client_method();
+ #endif
++#ifndef OPENSSL_NO_SSL3_METHOD
+                 } else if (strncasecmp(optarg, "SSL3", 4) == 0) {
+                     meth = SSLv3_client_method();
++#endif
+ #ifdef HAVE_TLSV1_X
+                 } else if (strncasecmp(optarg, "TLS1.1", 6) == 0) {
+                     meth = TLSv1_1_client_method();