* ldap.cc (CYG_LDAP_TIMEOUT): Set to 5 secs.
	(CYG_LDAP_ENUM_TIMEOUT): New timeout value for enumeration only.  Set
	to 60 secs.
	(CYG_LDAP_ENUM_PAGESIZE): Define as number of entries per single
	search page.  Set to 100.  Use throughout.
	(def_tv): Rename from tv.  Use throughout.
	(enum_tv): New variable.  Use in call to ldap_get_next_page_s.
	* client.cc: Throughout, fix debug output of signed byte count value.
	* dcrt0.cc (insert_file): Fix resource leaks (CIDs 59987, 59988).
	* dll_init.cc (dll_list::alloc): Fix buffer overrun (CID 59940).
	* environ.cc (regopt): Allocate small local buffer to avoid copying
	twice.  Fixes resource leak (CID 60012).  Add comment.
	* net.cc (cygwin_getaddrinfo): Fix value of hint->ai_addrlen on 64 bit.
	Explain why.
	* exceptions.cc (try_to_debug): Free environment pointer when not used
	anymore (CID 59968).
	* localtime.cc (tzload): Fix leaking memory (CID 60001).
	* malloc_wrapper.cc (mallinfo): Initialize m if external malloc is used,
	too (CID 60120).
	* mount.cc (fs_info::update): Define dir in the outermost scope to avoid
	accessing out-of-scope value (CID 60027).  Always initialize attr to
	upath (CID 60113).
	* regex/regcomp.c (computematchjumps): Free local memory in case of
	error (CID 59975).
	* select.cc (start_thread_socket): Delete si on early return in case of
	an error (CID 59967).
	* bsd_helper.cc (ipcexit_creat_hookthread): Delete shs in another error
	case to make Coverity really happy (CID 59993).
	* spawn.cc (find_exec): Initialize err (CID 60111).
	* strace.cc (strace::activate): Fix potential buffer overrun (CID 59938)
	* syscalls.cc (popen): Close parent pipe descriptor via fclosing fp on
	error to avoid resource leak (CID 59981).
	* thread.cc (pthread::exit): Avoid accessing cygtls member after
	deleting "this" (CID 60217).
	* libc/argz/envz_merge.c (envz_merge): Fix memory leak (Cygwin Coverity
	Scan CID 60023).
	* libc/ctype/iswalpha.c (iswalpha): Add bounds check to avoid
	out-of-bounds read from utf8 tables (CID 59949).
	* libc/locale/ldpart.c (__part_load_locale): Add 1 byte to size of lbuf.
	Write NUL into the last byte to accommodate split_lines (CID 60047).