Implement support for MySQL useSSL=true|false option.

The MySQL connection string parameter for SSL usage is useSSL, so map an
option name to our expected values for sslmode in database connection
strings.

See #748.

docs/ref/mysql.rst

@@ -74,6 +74,23 @@ the connection string. The MySQL connection string accepts the same
 parameter *sslmode* as the PostgreSQL connection string, but the *verify*
 mode is not implemented (yet).
 
+::
+
+    mysql://[user[:password]@][netloc][:port][/dbname][?option=value&...]
+
+
+  - *options*
+
+    The same notation rules as found in the *Connection String* parts of the
+    documentation apply, and we have a specific MySQL option: `useSSL`. The
+    value for `useSSL` can be either `false` or `true`.
+
+    If both `sslmode` and `useSSL` are used in the same connection string,
+    pgloader behavior is undefined.
+    
+The MySQL connection string also accepts the *useSSL* parameter with values
+being either *false* or *true*.
+
 Environment variables described in
 <http://dev.mysql.com/doc/refman/5.0/en/environment-variables.html> can be
 used as default values too. If the user is not provided, then it defaults to

src/parsers/command-mysql.lisp

@@ -98,11 +98,33 @@
 (defrule mysql-dsn-dbname (and "/" maybe-quoted-namestring)
   (:lambda (m-d-d) (list :dbname (text (second m-d-d)))))
 
+(defrule mysql-dsn-option-usessl-true  "true"  (:constant :yes))
+(defrule mysql-dsn-option-usessl-false "false" (:constant :no))
+
+(defrule mysql-dsn-option-usessl (and "useSSL" "="
+                                      (or mysql-dsn-option-usessl-true
+                                          mysql-dsn-option-usessl-false))
+  (:lambda (ssl)
+    (cons :use-ssl (third ssl))))
+
+(defrule mysql-dsn-option (or dsn-option-ssl
+                              mysql-dsn-option-usessl
+                              dsn-option-host
+                              dsn-option-port
+                              dsn-option-dbname
+                              dsn-option-user
+                              dsn-option-pass
+                              dsn-option-table-name))
+
+(defrule mysql-dsn-options (and "?" (and mysql-dsn-option
+                                         (* (and "&" mysql-dsn-option))))
+  (:lambda (opts) (cdr (flatten-option-list opts))))
+
 (defrule mysql-uri (and mysql-prefix
                         (? dsn-user-password)
                         (? dsn-hostname)
                         mysql-dsn-dbname
-                        (? dsn-options))
+                        (? mysql-dsn-options))
   (:lambda (uri)
     (destructuring-bind (&key type
                               user

src/sources/csv/csv-guess.lisp

@@ -6,7 +6,7 @@
 (defparameter *separators* '(#\Tab #\, #\; #\| #\% #\^ #\! #\$)
   "Common CSV separators to try when guessing file parameters.")
 
-(defparameter *escape-quotes* '("\\\"" "\"\"")
+(defparameter *escape-quotes* '("\"\"" "\\\"")
   "Common CSV quotes to try when guessing file parameters.")
 
 (defun get-file-sample (filename &key (sample-size 10))

test/mysql/f1db.load

@@ -1,3 +1,3 @@
 load database
-  from mysql://root@localhost/f1db
+  from mysql://root@localhost/f1db?useSSL=false
   into pgsql:///plop;