Move 'findrenames' code into its own file.
The next few patches will increase the size of the "findrenames"
functionality. This patch simply moves the function into its own
file to avoid clutter building up in 'cmdutil.py'.
#!/bin/sh
# 0-2-4
# \ \ \
# 1-3-5
#
# rename in #1, content change in #4.
hg init t
cd t
touch 1
touch 2
hg commit -Am init # 0
hg rename 1 1a
hg commit -m rename # 1
hg co -C 0
echo unrelated >> 2
hg ci -m unrelated1 # 2
hg merge --debug 1
hg ci -m merge1 # 3
hg co -C 2
echo hello >> 1
hg ci -m unrelated2 # 4
hg co -C 3
hg merge -y --debug 4
hg co -C 4
hg merge -y --debug 3