cleanup descriptions

package/mini_sendmail/Makefile

@@ -7,7 +7,7 @@ PKG_NAME:=		mini-sendmail
 PKG_VERSION:=		1.3.6
 PKG_RELEASE:=		1
 PKG_MD5SUM:=		fb1585d2ad81c519a26d83bfd783dee8
-PKG_DESCR:=		A small sendmail-compatible mail forwarder
+PKG_DESCR:=		small sendmail-compatible mail forwarder
 PKG_SECTION:=		mail
 PKG_URL:=		http://www.acme.com/software/mini_sendmail/
 PKG_SITES:=		http://www.acme.com/software/mini_sendmail/

package/postfix/Makefile

@@ -7,7 +7,7 @@ PKG_NAME:=		postfix
 PKG_VERSION:=		2.11.0
 PKG_RELEASE:=		1
 PKG_MD5SUM:=		25fe7dd05f81cc0755131beecee046fd
-PKG_DESCR:=		Postfix MTA
+PKG_DESCR:=		popular mail transfer agent
 PKG_SECTION:=		mail
 PKG_BUILDDEP:=		tinycdb
 PKG_URL:=		http://www.postfix.org/

package/ssmtp/Makefile

@@ -7,7 +7,7 @@ PKG_NAME:=		ssmtp
 PKG_VERSION:=		2.61
 PKG_RELEASE:=		1
 PKG_MD5SUM:=		957e6fff08625fe34f4fc33d0925bbc9
-PKG_DESCR:=		A minimal and secure mail sender
+PKG_DESCR:=		minimal and secure mail sender
 PKG_SECTION:=		mail
 PKG_SITES:=		http://ftp.debian.org/debian/pool/main/s/ssmtp/