Fix -Wpointer-sign errors in ia64-tdep.c

gdb/ChangeLog:

        * ia64-tdep.c (ia64_access_fpreg): Change cast of val
        from "char *" to "gdb_byte *".
        (ia64_access_rse_fpreg, ia64_access_mem): Likewise.
Fix -Wpointer-sign errors in solib-ia64-hpux.c

gdb/ChangeLog:

        * solib-ia64-hpux.c (ia64_hpux_read_dynamic_info): Change cast
        of &info->load_map from "char *" to "gdb_byte *".
Fix various -Wpointer-sign warnings in darwin-nat.c

gdb/ChangeLog:

        * darwin-nat.c (darwin_read_write_inferior): Change types
        of parameters rdaddr and wraddr to "gdb_byte *". Change type
        of copy_count to "mach_msg_type_number_t".
        (darwin_read_dyld_info): Change type of parameter
        rdaddr to "gdb_byte *".
	* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
	Use is_elf_hash_table rather than a handcoded condition.
	* lib/ld-lib.exp (check_shared_lib_support): Also exclude
	mips*-*-elf.
	bfd/
	* config.bfd: Replace alpha*-*-linuxecoff* pattern with
	alpha*-*-linux*ecoff*.

	binutils/testsuite/
	* lib/binutils-common.exp (is_elf_format): Also exclude
	*-*-linux*ecoff*.

	gas/
	* configure.tgt: Replace alpha*-*-linuxecoff* pattern with
	alpha*-*-linux*ecoff*.

	ld/
	* configure.tgt: Replace alpha*-*-linuxecoff* pattern with
	alpha*-*-linux*ecoff*.  Update the `sed' pattern used to convert
	from alpha*-*-linux-* to alpha*-*-linux*ecoff*.
gold/
	* stringpool.cc (Stringpool_template::new_key_offset): Fix
	uninitialized warning.
Restore empty string handling

	* merge.cc (Output_merge_string<Char_type>::do_add_input_section):
	Restore empty string handling.
* resource.cc (setrlimit): Use consistent commenting style.  Return EINVAL when
rlim_cur > rlim_max.
Modernized user guide, API reference, and FAQ generation.  Overall
effect is to move away from DocBook SGML and DJ Delorie's doctool and
toward pure DocBook XSL.  (There remains just one use of doctool, and
we have plans for replacing it, too.)  See ChangeLog for details.
Initial; ignoring generated files.
daily update
*** empty log message ***
Generating faq/faq.body automatically from faq/faq.html whenever latter
is updated, using new bodysnatcher.pl script.