Add config option for manually started services

Example:
    service manual:yes [2] /usr/sbin/lighttpd -- HTTP Server

Signed-off-by: Robert Andersson <robert.m.andersson@se.atlascopco.com>

docs/config.md

@@ -185,6 +185,12 @@ Syntax
   For a detailed description of conditions, and how to debug them, see
   the [Finit Conditions](conditions.md) document.
 
+  If a service should not be automatically started, it can be configured
+  as manual with the optional `manual` argument. The service can then be
+  started at any time by running `initctl start <service>`.
+
+        manual:yes
+
   The name of a service, shown by the `initctl` tool, defaults to the
   basename of the service executable. It can be changed with the
   optional `name` argument:

src/service.c

@@ -672,6 +672,7 @@ int service_register(int type, char *cfg, struct rlimit rlimit[], char *file)
 	int forking = 0;
 #endif
 	int levels = 0;
+	int manual = 0;
 	char *line;
 	char *username = NULL, *log = NULL, *pid = NULL;
 	char *service = NULL, *proto = NULL, *ifaces = NULL;
@@ -736,6 +737,8 @@ int service_register(int type, char *cfg, struct rlimit rlimit[], char *file)
 			pid = cmd;
 		else if (!strncasecmp(cmd, "name:", 5))
 			name = cmd;
+		else if (!strncasecmp(cmd, "manual:yes", 10))
+			manual = 1;
 		else if (cmd[0] != '/' && strchr(cmd, '/'))
 			service = cmd;   /* inetd service/proto */
 		else
@@ -811,6 +814,10 @@ recreate:
 			free(line);
 			return errno = ENOMEM;
 		}
+
+		if (type == SVC_TYPE_SERVICE && manual) {
+			svc_stop(svc);
+		}
 	}
 #ifdef INETD_ENABLED
 	else {