In RHEL7.2, iproute SRPM currently ships 46 different patches which are applied on top of the vanilla version 3.10.0. Most of them are not formal backports, therefore it is difficult to find out what changes they actually contain.

Also, when dealing with a bug, it's sometimes difficult to find out whether a given candidate for a fix has already been backported (and if that has been done correctly).

Therefore replace all those (partly consolidated) patches by formal backports, oriented at how the same is achieved for the kernel package.

This task has two implications:

1) Since some of the patches from upstream contain more changes than were originally backported into RHEL, it is not possible to do this rework in a clean way (i.e., resulting in identical source code afterwards). This means thorough regression testing has to be performed afterwards as importing bugs by accident can't be excluded categorically.

2) The number of separate patches will drastically increase (a little more than 180 upstream commits have been identified). This makes it even less practical to export them all into the SRPM, therefore follow the example of kernel package here as well, namely uploading tarballs containing already patched sources and referencing them from within the spec file.