* setfacl.c (action_t): Add DeleteAll value.
	(delacl): New function to remove all ACL entries not representing POSIX
	permissions.
	(setfacl): Rearrange conditional expression into switch statement.
	Add DeleteAll case.
	(usage): Add and describe -b option.
	(longopts): Add --remove-all option.
	(opts): Add -b option.
	(main): Handle -b option.
	* setfacl.c (usage): Add -b to require options.
	* highlights.xml: Rearrange itemizedlist markup slightly.
	* new-features.xml (ov-new1.7.33): Add setfacl -b option.
	* utils.xml (setfacl): Ditto.
	* new-features.xml (ov-new1.7.33): Fix paragraph order.
*** empty log message ***
	* cygheap.cc (cygheap_fixup_in_child): Drop call to set_dll_dir.
	(init_cygheap::init_installation_root): Set installation_dir_len.
	(setup_cygheap): Drop call to set_dll_dir.
	* cygheap.h (struct init_cygheap): Add installation_dir_len member.
	(init_cygheap::set_dll_dir): Remove.
	* environ.cc (win_env::add_cache): Use stpcpy for speed.
	(posify_maybe): Use tmp_pathbuf buffer instead of stack.
	(raise_envblock): New function to resize Windows environment block.
	(build_env): Fix indentation.  Call raise_envblock function.  Check if
	$PATH exists and is non-empty.  If not, add PATH variable with Cygwin
	installation directory as content to Windows environment.  Explain why.

	* uinfo.cc (cygheap_pwdgrp::_nss_init): Fill UNICODE_STRING members
	on the fly.  Drop call to RtlInitUnicodeString.
	(pwdgrp::check_file): Ditto.
	* new-features.xml (ov-new1.7.33): Document empty $PATH handling.
	* ntsec.xml: More language fixes.
	* dlfcn.cc (dlopen): Drop patch accommodating SetDllDiretory from
	2014-10-14.
	* libc/include/sys/unistd.h (sethostname): Declare if
	requested.
Merge branch 'Cygwin' into develop

Conflicts:
	winsup/cygwin/environ.cc