Support urlencoded URL's

[tacerus]

Hi,

this idea originates from openSUSE/MirrorCache#344 - it would be nice if zypper addrepo and the respective .repo files would accept URL's in an urlencoded fashion.

[RokeJulianLockhart]

However, a flag for each type—potentially --encoded and --unencoded, which defaults to --unencoded if either flag is absent—shall be necessary to ensure that estimation is unnecessary.

[mlandres]

I guess there's no way around an option telling how to treat the URL.

Ideally zypper would expect an encoded URL, an I thought it does. But the mistake was made back in 2008. While the zypper man page tells, that special chars must be %-escaped, it does not work. Bugreports in 2008 complaining about spaces or i18n chars not working in a URL were resolved by %-encoding the commandline argument before parsing it. This re-encodes any already encoded special chars.

We can not simply revert this, because it would break lot of setups, so we have to introduce an option, to allow already encoded URLs to work.

[mlandres]

Note that this applies to the zypper commandline only. URLs stored inside a .repo file e.g. are stored %-encoded.