graphlog: extract "graphnode" template keyword that represents node symbol This provides a default node symbol. Tests will be added later. "showparents" variable is renamed to "wpnodes" to avoid confusion with the existing showparents() function.

graphlog: move creation of workingdir-parent nodes to displaygraph() Future patches will make a node symbol templatable. Because arguments of a templatekw function are repo and ctx, "showparents" list will have to be built from a repo object by that function.

builddeb: read default distribution and codename from lsb_release This makes `make deb` place packages into a more appropriately named directory instead of just "debian-unknown".

builddeb: remove unused --debbuilddir option Looks like it was never used and after 7f49efcaa9b4 it can be removed.

builddeb: add --distid option to specify Distributor ID This allows builddeb to handle distributions that are not Debian. Distributor ID is reported by lsb_release --id, and in case of builddeb it's usually Debian or Ubuntu.

builddeb: rename --release option to --codename Debian and Ubuntu releases have both codenames and traditional version numbers. An entire "branch" of releases is referred to by its codename, and version numbers (e.g. 8.2, 14.04.3) are used to address individual releases. Since we use codenames for building .deb packages, let's call the option and the variable appropriately.

histedit: get rid of state.rules Now we are using state.actions instead of state.rules everywhere.