ipp-usb 0.9.27 announce

Hi everybody,

I am pleased to announce the release of ipp-usb 0.9.27.

A few hours before I've erroneously issued a  0.9.26 release. Please, 
ignore it and sorry for inconvenience.

This new release brings some bug fixes and improvements.

1. Previously, after introduction of [uid auth], ipp-usb attempted to 
obtain localhost client UID even if it was not actually required. For 
example, in the default, permissive configuration. If client UID could 
not be obtained, it could cause connection attempt to be rejected.

As result, ipp-usb didn't work in snap, because snap configuration 
effectively prohibits ability to obtain client UID (this problem was 
noticed and reported by Till).

Now, ipp-usb obtains client UID only if it is really required by 
configuration.

2. Fixed [uid auth] behavior on systems with IPv6 disabled in the kernel 
configuration and only IPv4 is enabled.

3. Fixed allocation of TCP ports for devices. ipp-usb attempts to 
persist port allocation, so once allocated, port is "bound" to device, 
and if device disconnected and then connected again, it will receive the 
same port. Strictly speaking, it is not required neither for printing 
nor for scanning, but this level of reproducibility should be convenient 
for users.

Due to mistake, at the moment of port allocation for newly connected 
device only allocations of currently connected devices were taken into 
consideration. So port allocated for some device could be reused by 
newly connected device, if old device was not connected when new device 
arrives.

This is fixed in this release.

4. External dependency, github.com/OpenPrinting/goipp, now "vendored" 
which means that copy of its sources included into the ipp-usb source 
tree. This is a standard Go practice, and consistency of "vendored" 
libraries is strictly controlled by Go toolchain.

As result, there is no need to package the github.com/OpenPrinting/goipp 
in order to build ipp-usb; The ipp-usb package currently has no external 
dependencies at the moment of building. It should simplify packaging 
process.

-- 

	Wishes, Alexander Pevzner ([email protected])