rewrite ^/some/url/(.*) https://mysite.net/some/url/$1 permanent;

location ~ ^/some/url/.*$ {
  rewrite ^ https://mysite.net$uri permanent;
}

server {
  listen 80;
  server_name mysite.net;
  access_log /var/log/nginx/mysite.net.access.log;
  root /srv/vhosts/mysite.net;
  index index.html index.htm index.php;

## Default location
  location / {
    rewrite ^ https://mysite.net$uri permanent;
  }

  location /something {
    # any special handling?
    # expires 30d;
  }

...

## Send requests with www to non-www domain for both ssl and non-ssl
server {
  listen 80;
  listen 443;
  server_name www.mysite.net;
  rewrite ^ $scheme://mysite.net$uri? permanent;
} 

## Non-ssl server
server {
  listen 80;
  server_name mysite.net;
  access_log /var/log/nginx/mysite.net.access.log;
  root /srv/vhosts/mysite.net;
  index index.html index.htm index.php;

## Send all requests to ssl except /folder/
  location / {
    rewrite ^ https://mysite.net$uri? permanent;
  }

## Serve files in this folder directly
  location /folder/ {
  }
}

## ssl server
server {
  listen 443;
  server_name mysite.net;
  access_log /var/log/nginx/mysite.net.access.log;
  root /srv/vhosts/mysite.net;
  index index.html index.htm index.php;

  ssl on;
  ssl_certificate /etc/ssl/certs/mysite.com_combined.crt;
  ssl_certificate_key /etc/ssl/private/mysite.com.key;

  location / {
    # regular handling
  }

  ...
}