Clean up library dependencies

Move stuff to untangle the ugly cyclic dependencies between the
archives built for selected subdirectories of src/lib/:

* Move common/io.c to empthread/ because it requires empthread stuff

* Move parts of subs/nstr.c to common/nstreval.c to satisfy
  common/ef_verify.o

* Move getstarg.c getstring.c onearg.c from gen/ to subs/ because they
  require stuff from there

* Move bridgefall.c check.c damage.c empobj.c journal.c maps.c
  sectdamage.c from common/ to subs/ because they require stuff from
  there

* Move cnumb.c from subs/ to common/ to satisfy common/type.o

* Move log.c fsize.c from common/ to gen/ because they really belong
  there

* Move emp_config.c mapdist.c from gen/ to common/ because they really
  belong there, and require stuff from libglobal.a

Also package as/ as libas.a to satisfy common/path.o.

Remaining dependencies:

    lib             needs
    --------------------------------------------
    libas.a         libglobal.a
    libcommon.a     libas.a libglobal.a libgen.a
    libgen.a
    libglobal.a
    liblwp.a        libgen.a
    libw32.a[*]     libgen.a

    [*] Except for service.o, which can only be linked into the server

Link order now: liblwp.a libcommon.a libas.a libgen.a libglobal.a
libw32.a.  The position of libw32.a is not quite right, but works
anyway.

src/lib/subs/journal.c

@@ -0,0 +1,169 @@
+/*
+ *  Empire - A multi-player, client/server Internet based war game.
+ *  Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ *                           Ken Stevens, Steve McClure
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  ---
+ *
+ *  See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
+ *  related information and legal notices. It is expected that any future
+ *  projects/authors will amend these files as needed.
+ *
+ *  ---
+ *
+ *  journal.c: Log a journal of events to a file
+ * 
+ *  Known contributors to this file:
+ *     Markus Armbruster, 2004-2007
+ */
+
+/*
+ * Journal file format: each line logs an event, and looks like this:
+ *
+ *     TIME THREAD EVENT DATA
+ *
+ * Events and their data are:
+ *
+ *     startup
+ *     shutdown
+ *     login CNUM HOSTADDR USER
+ *     logout CNUM
+ *     input INPUT
+ *     update ETU
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <time.h>
+#include "misc.h"
+#include "empthread.h"
+#include "journal.h"
+#include "optlist.h"
+#include "player.h"
+#include "prototypes.h"
+
+static char journal_fname[] = "journal.log";
+static FILE *journal;
+
+static FILE *
+journal_open(void)
+{
+    return fopen(journal_fname, "a+");
+}
+
+static void
+journal_entry(char *fmt, ...)
+{
+    static char buf[1024];
+    va_list ap;
+    time_t now;
+    unsigned char *p;
+
+    if (journal) {
+	time(&now);
+	fprintf(journal, "%.24s %p ", ctime(&now), empth_self());
+	
+	va_start(ap, fmt);
+	vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+	va_end(ap);
+
+	for (p = (unsigned char *)buf; *p; p++) {
+	    if (isprint(*p))
+		putc(*p, journal);
+	    else
+		fprintf(journal, "\\%03o", *p);
+	}
+	fputs("\n", journal);
+	if (debug)
+	    fflush(journal);
+	if (ferror(journal)) {
+	    logerror("Error writing journal (%s)", strerror(errno));
+	    clearerr(journal);
+	}
+    }
+}
+
+int
+journal_startup(void)
+{
+    if (!keep_journal)
+	return 0;
+    journal = journal_open();
+    if (!journal) {
+	logerror("Can't open %s (%s)", journal_fname, strerror(errno));
+	return -1;
+    }
+    journal_entry("startup");
+    return 0;
+}
+
+void
+journal_shutdown(void)
+{
+    journal_entry("shutdown");
+    if (journal) {
+	fclose(journal);
+	journal = NULL;
+    }
+}
+
+int
+journal_reopen(void)
+{
+    FILE *j;
+
+    if (!keep_journal)
+	return 0;
+    j = journal_open();
+    if (!j) {
+	logerror("Can't open %s (%s)", journal_fname, strerror(errno));
+	return -1;
+    }
+    if (journal)
+	fclose(journal);
+    journal = j;
+    return 0;
+}
+
+void
+journal_login(void)
+{
+    journal_entry("login %d %s %s",
+		  player->cnum, player->hostaddr, player->userid);
+}
+
+void
+journal_logout(void)
+{
+    journal_entry("logout %d", player->cnum);
+}
+
+void
+journal_input(char *input)
+{
+    journal_entry("input %s", input);
+}
+
+void
+journal_update(int etu)
+{
+    journal_entry("update %d", etu);
+}