systemd: show status when run with plymouth, and don't start plymouth a second time when it is already running

https://bugzilla.redhat.com/show_bug.cgi?id=674916

Hi all!
I added basic support for ALTLinux.
Please see patch or
http://git.altlinux.org/people/shaba/packages/systemd.git?p=systemd.git;a=shortlog;h=refs/heads/altlinux
Thanks.

There's already a condition that gives a warning if user is
cross-compiling an relying on files from the build system. AC_CHECK_FILE
macro only tests for file in the build system. Hence use a simple
'test -f' that does the same job, without the warning.

This removes some warnings when bootstrapping. The warnings were introduced
in autoconf 2.68. Reference:

http://www.flameeyes.eu/autotools-mythbuster/forwardporting/autoconf.html

The following code

	AC_COMPILE_IFELSE([
		<MY C CODE HERE>
		], ...)

is changed to

	AC_COMPILE_IFELSE(
		[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
		<MY C CODE HERE>
		])], ...)

Hi!
libselinux has a pkg-config file:

$ rpm -qf /usr/lib64/pkgconfig/libselinux.pc
libselinux-devel-2.0.98-alt1

$ cat /usr/lib64/pkgconfig/libselinux.pc
prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib64
includedir=/usr/include

Name: libselinux
Description: SELinux utility library
Version: 2.0.98
URL: http://userspace.selinuxproject.org/
Libs.private: -lsepol
Libs: -lselinux
Cflags:

Patch for use pkg-config in attach.

--
Alexey Shabalin

Hello,

     i`ve been using systemd for a while now, and found out that when
using NICE parameter for .service files the varible is not set correctly.
     i`ve found the problem in file *load-fragment.c* function
*config_parse_nice*        variable /*c->nice_set = false;*/  should be
/*c->nice_set = true;*/
     Problem is alsom manifesting on v17 but did not upgrade yet ...

https://bugzilla.redhat.com/show_bug.cgi?id=657234