[TAP] Add possibility to set the execution duration of synchronous queries.

				</td>

				<td>3600000 <em>(1 hour)</em></td>

			</tr>

			<tr class="optional">

				<td class="done">sync_execution_duration</td>

				<td></td>

				<td>integer</td>

				<td>

					<p>Execution duration (in milliseconds) for SYNCHRONOUS queries.</p>

					<p>

						If this property is set, it will be used as default and maximum execution

						duration for synchronous queries. For asynchronous queries,

						<code>default_execution_duration</code> and <code>max_execution_duration</code>

						will still be used as expected.

					</p>

					<p>

						<code>sync_execution_duration</code> MUST be less or equals to default_execution_duration.

						Why? Because synchronous queries are supposed to be quicker than asynchronous

						ones. If this rule is not respected, this execution duration is immediately

						set to <code>default_execution_duration</code>.

					</p>

					<p>

						A negative or null value means that the default execution duration will be

						used instead. Float values are not allowed.

					</p>

					<p><em>Default: same as <code>default_execution_duration</code>.

						But if <code>default_execution_duration</code> is not set, <code>max_execution_duration</code>

						will be used.

						If <code>max_execution_duration</code> is not set, the duration specified in the

						HTTP request will be used.

						And if no such duration is given either, an hard coded duration of

						10 seconds will be applied in order to avoid unlimited synchronous

						query.

					</em></p>

				</td>

				<td>5000 <em>(5 seconds)</em></td>

			</tr>

			<tr><td colspan="5">Output</td></tr>

			<tr class="optional">