move git-imap-send to email subpackage

git-imap-send is a tool to send patches so it belongs to email
subpackage. Additionally the change results in removing openssl
dependency from the main package.
package block-sha1 header files, makefile and config files

git-core is compiled using Linus's sha1 implementations, so
devel subpackage should provide the relevant headers.

Makefile and config files need to be also packaged as cgit uses
them to reconstruct flags used for git-core compilation.
updated to 1.8.4
Merge changes leading to 1.8.4
Revert "- migrate to apache 2.4"

This reverts commit 8bb520fecb2a7a2ac1d96e05eb309d6ac587c543.

Conflicts:
	git-core.spec
apache multiversion config
apply svn-exit-errors.patch

Patch was added in 2d4ceaa02364ca1122f8d3b53fb561937835d846 but wasn't
applied to sources.
updated to 1.8.4.1
gitweb package Requires: webserver(access)
gitweb: mod_env in suggests, so make SetEnv block optional
updated to 1.8.4.2
updated to 1.8.5.rc0; python-Git obsoleted upstream