build CHANGE rename too generic macros to libnetconf specific

ENABLE_TLS and ENABLE_SSH are too generic to be used as symbols
exported via header files to the user applications. Therefore the
symbols were renamed to NC_ENABLED_SSH and NC_ENABLED_TLS.
diff --git a/src/session_server.c b/src/session_server.c
index 1fa5fe5..fd260ac 100644
--- a/src/session_server.c
+++ b/src/session_server.c
@@ -359,7 +359,7 @@
 {
     pthread_spin_destroy(&server_opts.sid_lock);
 
-#if defined(ENABLE_SSH) || defined(ENABLE_TLS)
+#if defined(NC_ENABLED_SSH) || defined(NC_ENABLED_TLS)
     nc_server_del_endpt(NULL, 0);
 #endif
 }
@@ -481,13 +481,13 @@
         ps->pfds[ps->session_count - 1].fd = session->ti.fd.in;
         break;
 
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
     case NC_TI_LIBSSH:
         ps->pfds[ps->session_count - 1].fd = ssh_get_fd(session->ti.libssh.session);
         break;
 #endif
 
-#ifdef ENABLE_TLS
+#ifdef NC_ENABLED_TLS
     case NC_TI_OPENSSL:
         ps->pfds[ps->session_count - 1].fd = SSL_get_rfd(session->ti.tls);
         break;
@@ -665,7 +665,7 @@
     }
 
     if (i == ps->session_count) {
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
 retry_poll:
 #endif
         /* no leftover event */
@@ -689,7 +689,7 @@
             ps->sessions[i]->term_reason = NC_SESSION_TERM_OTHER;
             return 3;
         } else if (ps->pfds[i].revents & POLLIN) {
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
             if (ps->sessions[i]->ti_type == NC_TI_LIBSSH) {
                 uint16_t j;
 
@@ -731,7 +731,7 @@
                     continue;
                 }
             }
-#endif /* ENABLE_SSH */
+#endif /* NC_ENABLED_SSH */
 
             /* we are going to process it now */
             ps->pfds[i].revents = 0;
@@ -821,14 +821,14 @@
     }
 }
 
-#if defined(ENABLE_SSH) || defined(ENABLE_TLS)
+#if defined(NC_ENABLED_SSH) || defined(NC_ENABLED_TLS)
 
 int
 nc_server_add_endpt_listen(const char *name, const char *address, uint16_t port, NC_TRANSPORT_IMPL ti)
 {
     int sock;
     uint16_t i;
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
     struct nc_server_ssh_opts *ssh_opts;
 #endif
 
@@ -867,7 +867,7 @@
     server_opts.binds[server_opts.endpt_count - 1].sock = sock;
     server_opts.binds[server_opts.endpt_count - 1].ti = ti;
     switch (ti) {
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
     case NC_TI_LIBSSH:
         ssh_opts = calloc(1, sizeof *ssh_opts);
         /* set default values */
@@ -878,7 +878,7 @@
         server_opts.endpts[server_opts.endpt_count - 1].ti_opts = ssh_opts;
         break;
 #endif
-#ifdef ENABLE_TLS
+#ifdef NC_ENABLED_TLS
     case NC_TI_OPENSSL:
         server_opts.endpts[server_opts.endpt_count - 1].ti_opts = calloc(1, sizeof(struct nc_server_tls_opts));
         break;
@@ -973,12 +973,12 @@
             close(server_opts.binds[i].sock);
             pthread_mutex_destroy(&server_opts.endpts[i].endpt_lock);
             switch (server_opts.binds[i].ti) {
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
             case NC_TI_LIBSSH:
                 nc_server_ssh_clear_opts(server_opts.endpts[i].ti_opts);
                 break;
 #endif
-#ifdef ENABLE_TLS
+#ifdef NC_ENABLED_TLS
             case NC_TI_OPENSSL:
                 nc_server_tls_clear_opts(server_opts.endpts[i].ti_opts);
                 break;
@@ -1008,12 +1008,12 @@
                 close(server_opts.binds[i].sock);
                 pthread_mutex_destroy(&server_opts.endpts[i].endpt_lock);
                 switch (server_opts.binds[i].ti) {
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
                 case NC_TI_LIBSSH:
                     nc_server_ssh_clear_opts(server_opts.endpts[i].ti_opts);
                     break;
 #endif
-#ifdef ENABLE_TLS
+#ifdef NC_ENABLED_TLS
                 case NC_TI_OPENSSL:
                     nc_server_tls_clear_opts(server_opts.endpts[i].ti_opts);
                     break;
@@ -1113,7 +1113,7 @@
     (*session)->ti_opts = server_opts.endpts[idx].ti_opts;
 
     /* sock gets assigned to session or closed */
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
     if (server_opts.binds[idx].ti == NC_TI_LIBSSH) {
         ret = nc_accept_ssh_session(*session, sock, timeout);
         if (ret < 1) {
@@ -1121,7 +1121,7 @@
         }
     } else
 #endif
-#ifdef ENABLE_TLS
+#ifdef NC_ENABLED_TLS
     if (server_opts.binds[idx].ti == NC_TI_OPENSSL) {
         ret = nc_accept_tls_session(*session, sock, timeout);
         if (ret < 1) {
@@ -1204,7 +1204,7 @@
     pthread_mutex_init((*session)->ti_lock, NULL);
 
     /* sock gets assigned to session or closed */
-#ifdef ENABLE_SSH
+#ifdef NC_ENABLED_SSH
     if (ti == NC_TI_LIBSSH) {
         /* OPTS LOCK */
         pthread_mutex_lock(&ssh_ch_opts_lock);
@@ -1221,7 +1221,7 @@
         }
     } else
 #endif
-#ifdef ENABLE_TLS
+#ifdef NC_ENABLED_TLS
     if (ti == NC_TI_OPENSSL) {
         /* OPTS LOCK */
         pthread_mutex_lock(&tls_ch_opts_lock);
@@ -1267,4 +1267,4 @@
     return ret;
 }
 
-#endif /* ENABLE_SSH || ENABLE_TLS */
+#endif /* NC_ENABLED_SSH || NC_ENABLED_TLS */