Updated zsh completion from
issue722.
convert: workaround for cvsps.cache under Windows
In non-cygwin environment, cvsps fails to create its cache directory and redirect its output to stderr. Just ignore the error and capture stderr as well.
convert: avoid interpreting Windows path as CVS connection strings.
CVS connection strings regexp detect colons to separate protocols from path and login. Unfortunately, Windows paths contains colons and were interpreted as rsh connection strings.
hghave: detect cvs and cvsps availability
"cvsps -h" was returning 1 in cygwin, probably because CVSROOT was unset, which does not prevent it to work correctly.
parents: make it match the doc when called on a file
parents used to return the parent revision of the last revision updating selected file, instead of the updating revision itself.