Support passing an alternative home to Sequoia signing too

The macro name is stupid, %_sq_home would be better but to be consistent
with the long standing %_gpg_path counterpart...

docs/man/rpmsign.8.md

@@ -153,6 +153,10 @@ Implementation specific macros:
 :   Legacy macro for configuring user id with GnuPG. Use the implementation
     independent and non-ambiguous **%\_openpgp_sign_id** instead.
 
+**%\_sq\_path**
+
+:   The location of your Sequoia configuration if not the default.
+
 For example, to configure rpm to sign with Sequoia PGP using a key with
 fingerprint of 7B36C3EE0CCE86EDBC3EFF2685B274E29F798E08 you would include
 

macros.in

@@ -337,6 +337,11 @@ Supplements:   (%{name} = %{version}-%{release} and langpacks-%{1})\
 #
 #%_gpg_path /some/path
 
+#	Optional alternative path for Sequoia-sq configuration, same as
+#	passing --home to sq.
+#
+#%_sq_path /some/path
+
 #	The port and machine name of an HTTP proxy host (used for FTP/HTTP).
 #
 #%_httpport
@@ -630,6 +635,7 @@ Supplements:   (%{name} = %{version}-%{release} and langpacks-%{1})\
 %__sq @__SQ@
 %__sq_sign_cmd		%{shescape:%{__sq}} \
 	%{__sq} sign \
+	%{?_sq_path:--homedir %{shescape:%{_sq_path}}} \
         %{?_openpgp_sign_id:--signer-key %{_openpgp_sign_id}} \
 	%{?_sq_sign_cmd_extra_args} \
         --binary --detached --output %{shescape:%{?__signature_filename}} \