nit: doc/lightningd-config.5: Remove redundancy

doc/lightningd-config.5

@@ -245,7 +245,7 @@ The following is an example of a postgresql wallet DSN:
 
 .fi
 
-This will connect to a the DB server running on \fBlocalhost\fR port \fB5432\fR,
+This will connect to a DB server running on \fBlocalhost\fR port \fB5432\fR,
 authenticate with username \fBuser\fR and password \fBpass\fR, and then use the
 database \fBdb_name\fR\. The database must exist, but the schema will be managed
 automatically by \fBlightningd\fR\.
@@ -589,4 +589,4 @@ Main web site: \fIhttps://github.com/ElementsProject/lightning\fR
 Note: the modules in the ccan/ directory have their own licenses, but
 the rest of the code is covered by the BSD-style MIT license\.
 
-\" SHA256STAMP:d7a79bf79824019fd6cd2e9933f2861798e31a6cda6404886d7e1a33ea15db3d
+\" SHA256STAMP:8e80667950a40a059a3a320a095c2313bc99b00de06bb892c47f22cf458d6493

doc/lightningd-config.5.md

@@ -194,7 +194,7 @@ The following is an example of a postgresql wallet DSN:
 --wallet=postgres://user:pass@localhost:5432/db_name
 ```
 
-This will connect to a the DB server running on `localhost` port `5432`,
+This will connect to a DB server running on `localhost` port `5432`,
 authenticate with username `user` and password `pass`, and then use the
 database `db_name`. The database must exist, but the schema will be managed
 automatically by `lightningd`.