util: move all to shared/ and split external dependencies in separate internal libraries

Before:
  $ ldd /lib/systemd/systemd-timestamp
  linux-vdso.so.1 =>  (0x00007fffb05ff000)
  libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f90aac57000)
  libcap.so.2 => /lib64/libcap.so.2 (0x00007f90aaa53000)
  librt.so.1 => /lib64/librt.so.1 (0x00007f90aa84a000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f90aa494000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f90aae90000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f90aa290000)
  libattr.so.1 => /lib64/libattr.so.1 (0x00007f90aa08a000)
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f90a9e6e000)

After:
  $ ldd systemd-timestamp
  linux-vdso.so.1 =>  (0x00007fff3cbff000)
  libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f5eaa1c3000)
  librt.so.1 => /lib64/librt.so.1 (0x00007f5ea9fbb000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f5ea9c04000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f5eaa3fc000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f5ea9a00000)
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f5ea97e4000)

1 files changed, 0 insertions, 111 deletions

diff --git a/src/log.h b/src/log.h
deleted file mode 100644
index 3283808ff8..0000000000
--- a/src/log.h
+++ /dev/null
@@ -1,111 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#ifndef foologhfoo
-#define foologhfoo
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd 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.
-
-  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <syslog.h>
-#include <stdbool.h>
-#include <stdarg.h>
-
-#include "macro.h"
-
-typedef enum LogTarget{
-        LOG_TARGET_CONSOLE,
-        LOG_TARGET_KMSG,
-        LOG_TARGET_JOURNAL,
-        LOG_TARGET_JOURNAL_OR_KMSG,
-        LOG_TARGET_SYSLOG,
-        LOG_TARGET_SYSLOG_OR_KMSG,
-        LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
-        LOG_TARGET_NULL,
-        _LOG_TARGET_MAX,
-        _LOG_TARGET_INVALID = -1
-}  LogTarget;
-
-void log_set_target(LogTarget target);
-void log_set_max_level(int level);
-void log_set_facility(int facility);
-
-int log_set_target_from_string(const char *e);
-int log_set_max_level_from_string(const char *e);
-
-void log_show_color(bool b);
-void log_show_location(bool b);
-
-int log_show_color_from_string(const char *e);
-int log_show_location_from_string(const char *e);
-
-LogTarget log_get_target(void);
-int log_get_max_level(void);
-
-int log_open(void);
-void log_close(void);
-void log_forget_fds(void);
-
-void log_close_syslog(void);
-void log_close_journal(void);
-void log_close_kmsg(void);
-void log_close_console(void);
-
-void log_parse_environment(void);
-
-int log_meta(
-        int level,
-        const char*file,
-        int line,
-        const char *func,
-        const char *format, ...) _printf_attr_(5,6);
-
-int log_metav(
-        int level,
-        const char*file,
-        int line,
-        const char *func,
-        const char *format,
-        va_list ap);
-
-_noreturn_ void log_assert_failed(const char *text, const char *file, int line, const char *func);
-_noreturn_ void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func);
-
-/* This modifies the buffer passed! */
-int log_dump_internal(
-        int level,
-        const char*file,
-        int line,
-        const char *func,
-        char *buffer);
-
-#define log_full(level, ...) log_meta(level,   __FILE__, __LINE__, __func__, __VA_ARGS__)
-
-#define log_debug(...)   log_meta(LOG_DEBUG,   __FILE__, __LINE__, __func__, __VA_ARGS__)
-#define log_info(...)    log_meta(LOG_INFO,    __FILE__, __LINE__, __func__, __VA_ARGS__)
-#define log_notice(...)  log_meta(LOG_NOTICE,  __FILE__, __LINE__, __func__, __VA_ARGS__)
-#define log_warning(...) log_meta(LOG_WARNING, __FILE__, __LINE__, __func__, __VA_ARGS__)
-#define log_error(...)   log_meta(LOG_ERR,     __FILE__, __LINE__, __func__, __VA_ARGS__)
-
-/* This modifies the buffer passed! */
-#define log_dump(level, buffer) log_dump_internal(level, __FILE__, __LINE__, __func__, buffer)
-
-const char *log_target_to_string(LogTarget target);
-LogTarget log_target_from_string(const char *s);
-
-#endif