configure: Clean up the introductory message a bit.

Eliminate a typo or two, and mention that the user can edit
Makefile.config if necessary.

diff --git a/configure b/configure
index e55f067e4bf696fe8c35228771eebf24804ec9a6..b1ac741d32d6361aaec4643bc21508ff39104aa3 100755 (executable)
--- a/configure
+++ b/configure
@@ -7,14 +7,16 @@ We hope that the process of building and installing notmuch is quick
 and smooth so that you can soon be reading and processing your email
 more efficiently than ever.
 
-If anything goes wrong in this process, please do as much as you can
-to figure out what could be different on your machine compared to
-those of the notmuch developers. Then, please email those details to
-the Notmuch list (notmuch@notmuchmail.org) so that we can hopefully make
-future versions of notmuch easier for you to use.
-
-We'll now investigate your system to find verify that various software
-components that notmuch relies on are available.
+If anything goes wrong in the configure process, you can override any
+decisions it makes by manually editing the Makefile.config file that
+it creates. Also please do as much as you can to figure out what could
+be different on your machine compared to those of the notmuch
+developers. Then, please email those details to the Notmuch list
+(notmuch@notmuchmail.org) so that we can hopefully make future
+versions of notmuch easier for you to use.
+
+We'll now investigate your system to verify that all required
+dependencies are available:
 
 EOF