tests/hghave: test that the inotify unix socket actually can be created Inotify do not work on FAT filesystems.

tests/hghave: test that a fifo actually can be created on the filesystem Some tests were failing on FAT filesystems.

tests/hghave: consistently use dir='.', prefix=tempprefix for tempfiles Some feature tests were done in the wrong directory and could thus give the wrong result.

test-merge-tools: adapt for Windows

tests/hghave: extract hghave.py hghave is degraded to a bare script, moving the functions to hghave.py so they can be shared later on.

test-alias: adapt for Windows The test used 'echo' to test '!' style aliases. On Windows 'echo' is handled by cmd and thus behaves very differently from the 'normal' echo command. The simple workaround used here for using the same alias on all platforms is to use 'printf' instead. Msys 'printf' will also handle sh quoting and escaping in cmd. Environment variable expansion with sh syntax is handled by launching sh.

test-hook: adapt for Windows