fix mandoc warnings

- sort references in SEE ALSO section to section number, name.
- cols.1: proper order of sections.
- wrap lines to max 79 column length.

uuencode.1

@@ -10,10 +10,9 @@
 .Ar name
 .Sh DESCRIPTION
 .Nm
-reads file (or by default, the standard input) and writes an encoded
-version to the standard output.  The encoding uses only printing ASCII
-characters and includes the mode of the file and the operand name
-for use by uudecode.
+reads file (or by default, the standard input) and writes an encoded version
+to the standard output. The encoding uses only printing ASCII characters and
+includes the mode of the file and the operand name for use by uudecode.
 .Sh IMPLEMENTATION NOTES
 This version of uuencode does not currently support the base64
 encoding algorithm.