add aliases to Three hole pipe

"silbo", "xipla" "pito", "txistu" or "txirula" in the Basque Country;
"Chifla" or "pitu" in Leon, "silbu" in Cantabria;
"Chiflo" and "miniflauta" in Aragon;
"Gaita charra" in Salamanca; "Pito rociero" in Huelva,
"Gaita hurdana" in Caceres.
Outside Spain it relates to other instruments such as the "tabor flute" or "galoubet".

Appears, as "Gaita charra", on many La Musgaña's works, like this:

• Entradilla
• Pasacalles de Los Arribes
• Cantigas de Santa María
• Pica de Saelices
• Charro zamorano
• El mirlo
• Charro salmantino a trío
• Día de hilar
• Pasacalles de El Alba
• Pica de bodas
• Sal a bailar, mocita
• Salamanca la blanca
• Toque de teatro
• Charrada del Tío Frejón
• Espejo, sol y luna
• Aguasvertientes
• Danzantes
• Pindongos de Montehermoso
• La mocita
• Chañe
• Las inviernas

Also in:
Paco Díaz y La Bazanca Aguaclara