order commands alphabetically

revlog: improve delta generation heuristics for generaldelta Without this change, pulls (and clones) into a generaldelta repository could generate very inefficient revlogs, the size of which could be at least twice the original size. This was caused by the generated delta chains covering too large distances, causing new chains to be built far too often. This change addresses the problem by forcing a delta against second parent or against the previous revision, when the first parent delta is in danger of creating a long chain.

keyword: use cmdutil.command decorator

gpg: use cmdutil.command decorator

mq: use cmdutil.command decorator

commands: use a decorator to build table incrementally this allows to define the table entries near the command functions

revlog: fix bug in chainbase cache The bug didn't cause corruption, and thus wasn't caught in hg verify or in tests. It could lead to delta chains longer than normally allowed, by affecting the code that decides when to add a full revision. This could, in turn, lead to performance regression.

setup.py: workaround for missing bz2 module in IronPython IronPython does not provide the bz2 module on its own. This patch skips importing it to allow setup to continue. (minor tweaks by mpm)

httpconnection: fix debug logging option for httpclient

httpclient: import f4c380237fd5 to fix keepalive not working