BaikalSSL_setup

First, install need stuff
$ apt-get install php5-cgi autoconf automake autotools-dev curl libapr1 libtool curl libcurl4-openssl-dev php-pear php-xml-parser php5 php5-cli php5-common php5-curl php5-dev php5-gd php5-sqlite php5-fpm

To generate private (dummy) certificates you can perform the following list of openssl commands.
First change directory to where you want to create the certificate and private key, for example:

$ cd /usr/local/nginx/conf
Now create the server private key, you'll be asked for a passphrase:

$ openssl genrsa -des3 -out server.key 1024
Create the Certificate Signing Request (CSR):

$ openssl req -new -key server.key -out server.csr
Remove the necessity of entering a passphrase for starting up nginx with SSL using the above private key:

$ cp server.key server.key.org
$ openssl rsa -in server.key.org -out server.key
Finally sign the certificate using the above private key and CSR:

$ openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt
Update Nginx configuration by including the newly signed certificate and private key:

$ cat /etc/nginx/sites-enabled/baikal.nginx
server {
    listen 80;
    server_name ololo.com;
    rewrite ^ https://$server_name$request_uri? permanent;
}

server {
    listen       443 ssl;
    server_name  ololo.com;

    root  /var/www/;#baikal placed in /var/www/baikal, after install please test on adress https://ololo.com/baikal/http/admin
    index index.php;
    
    ssl_certificate /usr/local/nginx/conf/server.crt;
    ssl_certificate_key /usr/local/nginx/conf/server.key;

    charset utf-8;

    location ~ /baikal/(\.ht|Core|Specific) {
        deny all;
        return 404;
    }

    location ~ ^(.+\.php)(.*)$ {
        try_files $fastcgi_script_name =404;
        fastcgi_split_path_info  ^(.+\.php)(.*)$;
        fastcgi_pass   127.0.0.1:9000;#unix:/var/run/php-fpm/php-fpm.sock;
        fastcgi_param  SCRIPT_FILENAME  $document_root/$fastcgi_script_name;
        fastcgi_param  PATH_INFO        $fastcgi_path_info;
        include        /etc/nginx/fastcgi_params;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /var/www/nginx-default;
    }
}

Client setup

Apple iCal (OSX):
* username: the username you just created (in our example, jerome) 
* password: the password you just defined 
* In server address (replace domain and username): http://dav.mydomain.com/cal.php/principals/jerome 

Apple Calendar (iOS):
* in Settings > Mail, Contacts, Calendar > Add an account > Other 
* Select "CalDAV" 
* Server: http://dav.mydomain.com/cal.php/principals/jerome 
* username: the username you just created (in our example, jerome) 
* password: the password you just defined 

Apple Address Book (OSX):
* username: the username you just created (in our example, jerome) 
* password: the password you just defined 
* In server address (replace domain and username): http://dav.mydomain.com/card.php/addressbooks/jerome/default 

Apple Contacts (iOS):
* in Settings > Mail, Contacts, Calendar > Add an account > Other 
* Select "CardDAV" 
* Server: dav.mydomain.com/card.php          (note: no http:// nor https://, and no trailing slash) 
* username: the username you just created (in our example, jerome) 
* password: the password you just defined