instead, do chdir inside Makefile

options as --with-zlib=../zlib-1.2.3.  It seems there is no common way
to learn the current directory in Win32 make's: although nmake has MAKEDIR
variable, nevertheless Borland make's MAKEDIR is the directory where make
is installed, and OpenWatcom wmake has no MAKEDIR at all.

*) rename imap to mail, sort pop3/imap functions
*) smtp auth support
*) pop3 starttls only
*) fix segfault if cram-md5 was used without apop

    *) Change in internal API: the HTTP modules initialization was moved
       from the init module phase to the HTTP postconfiguration phase.

    *) Change: now the request body is not read beforehand for the
       ngx_http_perl_module: it's required to start the reading using the
       $r->has_request_body method.

    *) Feature: the ngx_http_perl_module supports the DECLINED return code.

    *) Feature: the ngx_http_dav_module supports the incoming "Date" header
       line for the PUT method.

    *) Feature: the "ssi" directive is available inside the "if" block.

    *) Bugfix: a segmentation fault occurred if there was an "index"
       directive with variables and the first index name was without
       variables; the bug had appeared in 0.1.29.

    *) Feature: the "stub" parameter in the "include" SSI command.

    *) Feature: the "block" SSI command.

    *) Feature: the unicode2nginx script was added to contrib.

    *) Bugfix: if a "root" was specified by variable only, then the root
       was relative to a server prefix.

    *) Bugfix: if the request contained "//" or "/./" and escaped symbols
       after them, then the proxied request was sent unescaped.

    *) Bugfix: the $r->headers_in("Cookie") of the ngx_http_perl_module now
       returns all "Cookie" header lines.

    *) Bugfix: a segmentation fault occurred if
       "client_body_in_file_only on" was used and nginx switched to a next
       upstream.

    *) Bugfix: on some condition while reconfiguration character codes
       inside the "charset_map" may be treated invalid; the bug had
       appeared in 0.3.50.

    *) Feature: nginx now logs the subrequest information to the error log.

    *) Feature: the "proxy_next_upstream", "fastcgi_next_upstream", and
       "memcached_next_upstream" directives support the "off" parameter.

    *) Feature: the "debug_connection" directive supports the CIDR address
       form.

    *) Bugfix: if a response of proxied server or FastCGI server was
       converted from UTF-8 or back, then it may be transferred incomplete.

    *) Bugfix: the $upstream_response_time variable had the time of the
       first request to a backend only.

    *) Bugfix: nginx could not be built on amd64 platform; the bug had
       appeared in 0.3.53.

    *) Feature: the ngx_http_dav_module.

    *) Change: the ngx_http_perl_module optimizations.
       Thanks to Sergey Skvortsov.

    *) Feature: the ngx_http_perl_module supports the $r->request_body_file
       method.

    *) Feature: the "client_body_in_file_only" directive.

    *) Workaround: now on disk overflow nginx tries to write access logs
       once a second only.
       Thanks to Anton Yuzhaninov and Maxim Dounin.

    *) Bugfix: now the "limit_rate" directive more precisely limits rate if
       rate is more than 100 Kbyte/s.
       Thanks to ForJest.

    *) Bugfix: now the IMAP/POP3 proxy escapes the "\r" and "\n" symbols in
       login and password to pass authorization server.
       Thanks to Maxim Dounin.