Updated system dependent and OS2 support from upstream.

Updated system dependent and OS2 support from upstream.

Added the following commits from upstream plus some clean-up (Dietze's
commit changed osd.c file format from unix to dos, but also some some
simplifications).

    Author: Bill Pringlemeir <bpringlemeir@users.sourceforge.net>
    Date:   Fri Jul 9 23:45:08 2010 +0000

	Clean up for target 'lintme'.

	CVS-ID: src/osd.c 1.45

    Author: Bill Pringlemeir <bpringlemeir@users.sourceforge.net>
    Date:   Thu Aug 7 02:51:59 2008 +0000

	Allow compile on apple platforms. osd.c
	Use pid_t instead of __pid_t as per open group.

	CVS-ID: src/osd.c 1.44

    Author: Herbert Martin Dietze <herbert@users.sourceforge.net>
    Date:   Fri Aug 10 22:31:05 2007 +0000

	Fixed the OS/2 specific files for the latest release.

	CVS-ID: os2/BUILD.OS2 1.7
	CVS-ID: os2/make.vars 1.2
	CVS-ID: os2/makeos2.cmd 1.8
	CVS-ID: os2/run_splint.cmd 1.2
	CVS-ID: src/Makefile.os2 1.8
	CVS-ID: src/osd.c 1.43
	CVS-ID: test/tainted/Makefile.os2 1.2
	CVS-ID: test/Makefile.os2 1.6