Fix #186: allow continuation character in .conf files

This change makes it possible to use the standard continuation character
in .conf files.  For example:

    service [23456]     \
         log:stderr     \
         <!pid/foo>     \
         bar            \
         -- This is the bar service, it depends on foo # comment that's dropped

Notice the additional support for comments on .conf lines.  If you use
the comment character today you must change to escape it.  Like this:

    service :2 foo -- Foo \#2

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/initctl-status-subset.sh

@@ -37,9 +37,9 @@ test_add_one()
 
 test_init
 
-test_add_one "task manual:yes name:foo :1 serv -- Foo #1"
-test_add_one "task manual:yes name:foo :2 serv -- Foo #2"
-test_add_one "task manual:yes name:foo :3 serv -- Foo #3"
+test_add_one "task manual:yes name:foo :1 serv -- Foo \#1"
+test_add_one "task manual:yes name:foo :2 serv -- Foo \#2"
+test_add_one "task manual:yes name:foo :3 serv -- Foo \#3"
 test_add_one "task manual:yes name:foobar serv -- Foobar"
 
 say 'Reload Finit'

test/signal-service.sh

@@ -19,16 +19,23 @@ test_teardown()
 say "Test start $(date)"
 
 say 'Ensure file system is cleared'
-texec rm -f /tmp/usr1.log
+run "rm -f /tmp/usr1.log"
 
+# Verifies line continuation as well
 say "Add service stanza in $FINIT_CONF"
-texec sh -c "echo 'service [2345] kill:20 log service.sh -- Test service' > $FINIT_CONF"
+run "echo 'service [2345] kill:20 \\
+  log service.sh \\
+   -- Test service' > $FINIT_CONF"
+run "cat $FINIT_CONF"
+#run "initctl debug"
 
 say 'Reload Finit'
-texec sh -c "initctl reload"
+run "initctl reload"
+
+#run "initctl status service.sh"
 
 say 'Send SIGUSR1 to service...'
-texec sh -c "initctl signal service.sh SIGUSR1"
+run "initctl signal service.sh SIGUSR1"
 
 # shellcheck disable=SC2016
 retry 'assert "service.sh received SIGUSR" "$(texec cat /tmp/usr1.log)" = "USR1"' 10 1