Support specifying an output filename #2
Description
To not interfere with the complexity of the URL itself, a special settings syntax should be considered, e.g. http:{filename=trmi-0.1.4.zip}//downloads.sourceforge.net/project/trmi/trmi/trmi-0.1.4/trmi-0.1.4.zip?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Ftrmi%2Ffiles%2Ftrmi%2Ftrmi-0.1.4%2Ftrmi-0.1.4.zip%2Fdownload.
This is related to #1.