Fix bad manual references without the section.

sh/shrc.5

@@ -57,7 +57,7 @@ script.
 .Xr sh 1 ,
 .Xr shrc 5
 .Sh CAVEATS
-.Xr dash
+.Xr dash 1
 does not use the
 .Nm
 script, but instead only uses the

share/man/man7/installation.7

@@ -499,7 +499,7 @@ procedure to amend the installation medium with your public key, pregenerated
 server private keys, and a random seed.
 You are using a bad workflow if you encounter a ssh server fingerprint check.
 If the installer environment contains a
-.Xr sshd_config
+.Xr sshd_config 5
 or private sshd keys, then you will be asked if you want to copy the files into
 the new installation.
 .Ss Completion

tix/tix-iso-bootconfig.8

@@ -329,7 +329,7 @@ this
 option to the
 .Xr kernel 7
 to select the
-.Ar terminal
+.Ar terminal 1
 to use as the console and the settings to initialize it.
 .Pp
 The