*.3: add/extend "SEE ALSO" sections

docs/libcurl/libcurl-easy.3

@@ -54,4 +54,5 @@ transfer, or if you're done, cleanup the session by calling
 cleanup immediately, but instead run ahead and perform other transfers using
 the same easy handle.
 .SH "SEE ALSO"
-.BR curl_easy_init "(3)," curl_easy_cleanup "(3)," curl_easy_setopt "(3)"
+.BR curl_easy_init "(3)," curl_easy_cleanup "(3)," curl_easy_setopt "(3), "
+.BR libcurl-errors "(3), " libcurl-multi "(3), " libcurl "(3) "

docs/libcurl/libcurl-errors.3

@@ -297,3 +297,7 @@ Not enough memory was available.
 .IP "CURLSHE_NOT_BUILT_IN (5)"
 The requested sharing could not be done because the library you use don't have
 that particular feature enabled. (Added in 7.23.0)
+.SH "SEE ALSO"
+.BR curl_easy_strerror "(3), " curl_multi_strerror "(3), "
+.BR curl_share_strerror "(3), " CURLOPT_ERRORBUFFER "(3), "
+.BR CURLOPT_VERBOSE "(3), " CURLOPT_DEBUGFUNCTION "(3) "

docs/libcurl/libcurl-multi.3

@@ -180,3 +180,5 @@ the future, you should be aware of the following current restrictions:
  - file:// transfers
  - TELNET transfers
 .fi
+.SH "SEE ALSO"
+.BR libcurl-errors "(3), " libcurl-easy "(3), " libcurl "(3) "

docs/libcurl/libcurl-share.3

@@ -63,3 +63,4 @@ When you're done using the share, make sure that no easy handle is still using
 it, and call \fIcurl_share_cleanup(3)\fP on the handle.
 .SH "SEE ALSO"
 .BR curl_share_init "(3), " curl_share_setopt "(3), " curl_share_cleanup "(3)"
+.BR libcurl-errors "(3), " libcurl-easy "(3), " libcurl-multi "(3) "

docs/libcurl/libcurl-tutorial.3

@@ -1408,3 +1408,5 @@ installs the library, header files, man pages etc.
 .IP "[4]"
 This behavior was different in versions before 7.17.0, where strings had to
 remain valid past the end of the \fIcurl_easy_setopt(3)\fP call.
+.SH "SEE ALSO"
+.BR libcurl-errors "(3), " libcurl-multi "(3), " libcurl-easy "(3) "