gsocket: Minor documentation clarifications
gsocket: Minor documentation clarifications

As suggested by Dan Winship on bug #697907.

endlessm/glib,Distrotech/glib,Distrotech/glib,endlessm/glib,cention-sany/glib,ieei/glib,johne53/MB3Glib,johne53/MB3Glib,Distrotech/glib,Distrotech/glib,MathieuDuponchelle/glib,ieei/glib,ieei/glib,cention-sany/glib,cention-sany/glib,ieei/glib,johne53/MB3Glib,cention-sany/glib,johne53/MB3Glib,MathieuDuponchelle/glib,MathieuDuponchelle/glib,mzabaluev/glib,MathieuDuponchelle/glib,johne53/MB3Glib,ieei/glib,endlessm/glib,Distrotech/glib,mzabaluev/glib,MathieuDuponchelle/glib,endlessm/glib,mzabaluev/glib,johne53/MB3Glib,mzabaluev/glib,cention-sany/glib,endlessm/glib,mzabaluev/glib