patchRe: [PATCH] Add options to specify snapshot file name, prefix

> commit b629275 implemented "smart" snapshot names and prefixes. I have
> scripts that used to rely on the old behaviour which allowed in some
> cases to have fixed prefix, and would require modifications to work with
> newer Gitweb.
> 
> This patch adds two parameters for overriding the snapshot name and
> prefix, sn and sp respectively. For example, to get a snapshot
> named "myproject.[suffix]" with no prefix one can add this query string:
>   ?sn=myproject;sp=
> 
> Signed-off-by: Thomas Guyot-Sionnest <dermoth@aei.ca>
> ---
>  gitweb/gitweb.perl |    8 ++++++++
>  1 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
> index 4f0c3bd..4820ef7 100755
> --- a/gitweb/gitweb.perl
> +++ b/gitweb/gitweb.perl
> @@ -756,6 +756,8 @@ our @cgi_param_mapping = (
>  	searchtext => "s",
>  	searchtype => "st",
>  	snapshot_format => "sf",
> +	snapshot_name => "sn",
> +	snapshot_prefix => "sp",
>  	extra_options => "opt",
>  	search_use_regexp => "sr",
>  	ctag => "by_tag",
> @@ -6684,6 +6686,12 @@ sub git_snapshot {
>  	}
>  
>  	my ($name, $prefix) = snapshot_name($project, $hash);
> +	if (defined($input_params{'snapshot_name'})) {
> +		$name = $input_params{'snapshot_name'};
> +	}
> +	if (defined($input_params{'snapshot_prefix'})) {
> +		$prefix = $input_params{'snapshot_prefix'};
> +	}
>  	my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
>  	my $cmd = quote_command(
>  		git_cmd(), 'archive',